Issuu

Volume 65 Issue 5 September/October 2026

Building Services Engineering I November/December 2025 1

ASHRAE Ireland President Dr John McKeon

Critical Energy Infrastructure Minister Darragh O’Brien

Mitsubishi Electric Harmony Awards shortlist

Cold Logic: The Liquid Cooling Shift in AI Data Centres

WIBSE Ireland Scan the QR code to visit www.buildingservicesengineering.ie M A G A Z I N E

D I G I T A L

S O C I A L

Building Services Engineering I September/October 2026 1

CAHV-Z High-temperature, low carbon heating for commercial buildings Natural Refrigerant Low GWP 75°C Flow Temperature 280kW Cascade System Low Noise Mode Scalable Monobloc Design Rapid Defrost Technology Built-in R290 Safety Features

High-temperature, scalable, low carbon heat pump for modern and retrofit commercial buildings Helping specifiers and installers reduce embodied carbon, meet evolving F-Gas requirements and support building decarbonisation strategies.

les.mitsubishielectric.ie Mitsubishi Electric Ireland

Mitsubishi Electric Ireland Commercial

Mitsubishi Electric Ireland

Building Services Engineering September/October 2026 1

Contents editorial

FROM DUST TO DIRECT-TO-CHIP

he CIF Construction Safety Campaign 2026 (12–23 October) offers a timely moment to align daily practice with evolving lifecycle standards. Insights from the recent CIBSE Building Safety 2026 conference in London reinforce a core truth: Safety reform must shift from passive regulatory understanding to active implementation. As keynote speaker Dame Judith Hackitt highlighted, turning principles into practice requires focus in key areas. First, safety demands demonstrable competence and clear accountability across the building lifecycle, backed by assurance systems that validate choices from design onward. Second, safety must extend past handover; facilities management and maintenance, and controls require robust resourcing to manage operational risks during occupation. As Ireland accelerates toward net zero, adopting complex decarbonisation and retrofit technologies introduces novel risks that require rigorous management. Building services engineers are central to delivering this and bear a pivotal duty of care. Embracing verified competence, cross-disciplinary collaboration and proactive risk management will ensure the green transition produces buildings that are both sustainable and safe. In this packed issue of Building Services Engineering, we examine government plans for critical energy infrastructure, data centre resilience and look at some of the game-changing technologies and systems driving sector progress.

Rethinking environmental risk in the AI data centre. As AI drives extreme rack densities, data centres are transitioning from simple air cooling to complex, liquidenabled thermal ecosystems.

Europe’s e-waste future EU circularity framework 2026 Harmony Awards H&MV US expansion CAHV-Z R290 Heat Pump WorldSkills Ireland 2026 Panasonic refrigeration Wilo seals EcoVadis Platinum CIBSE Webinars Áine Myler Appointed EI DG Versatile radiators Critical infrastructure update Hot water storage

2 2 4 6 7 8 9 11 12 13 14 16 22

Cooling the future CIBSE Ireland Golf Wavin HEPvO valve Annual BSS Golf Day WiBSE Ireland night Euro Gas heating innovation Construct Innovate blueprint Davies’ One-Stop Solution Radiator selection Decarbonising Elevators Careers in Engineering Heat pump selection Appointments

Robbie Cousins Editor FROM ER TO IAQ

ASHRAE Ireland President Dr John McKeon on why he believes Ireland is particularly well positioned to contribute to the international conversation on healthy, resilient buildings.

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Published under license by Tower Media Ltd 11 Hunter’s Leap, Newcastle, Co Wicklow. A63 D983 Tel: (01) 661 6448 Email: robbie@buildingservicesengineering.ie www.buildingservicesengineering.ie Editor: Robbie Cousins Design: Joanne Birmingham Advertising: Philip McGaley (087 266 6568), Joe Connolly (086 396 6158) Printed by: W&G Baird ISSN 2712-0198 Vol 65 No 5 2026 conference in © 2026 [JPR Partnership]. All rights reserved.

35 EUROPE’S DATA CENTRE BOOM NEEDS MORE THAN POWER

Mihai Barcanescu, Policy Manager, EFCA, explains why building a resilient digital future demands a holistic engineering approach focused on water sustainability, physical security and cross-system integration.

24 26 28 30 35 40 42 44 46 50 56 59 64

2 Building Services Engineering I September/October 2026

NEWS AND PRODUCTS Europe’s e-waste future takes centre stage at international Dublin WEEE Forum

Co-hosted by WEEE Ireland at Clontarf Castle, Dublin, on 17 and 18 September, the WEEE Forum International Conference 2026 – “From Challenge to Change”, brought together European delegates during Ireland’s EU Council presidency. High-level sessions addressed key priorities for the electronics value chain, including critical raw material security, European industrial resilience, the proposed “e-waste levy” as a new EU own resource, and the upcoming Circular Economy Act. During the conference, senior representatives from the European Commission’s Directorate-General for Environment highlighted the importance of ensuring that future WEEE collection targets properly account for long-life equipment, such as PV panels, heating and ventilation equipment. The current placed-on-market calculation can distort performance where equipment remains in use for many years before becoming waste. This issue is expected to be addressed in the new WEEE framework, with greater recognition of product lifetimes in how targets are calculated. Closing the event, Pascal Leroy, Director General of the WEEE Forum, synthesised eight vital takeaways for Extended Producer Responsibility (EPR): extending product stewardship to embrace broader societal responsibility; driving legislative reform, mutual recognition across the EU Single Market, and robust state enforcement; fostering cross-value-chain partnerships, notably

Pascal Leroy, Director General of the WEEE Forum, delivers his closing remarks in Clontarf Castle, Dublin.

between battery and WEEE sectors; addressing structural manufacturing hurdles; adapting strategic mindsets to global geopolitics; ensuring financial viability for circular models; motivating positive consumer choices; and implementing total system tracking. By bringing international delegates, policymakers, and industry pioneers together, the conference translated complex regulatory and geopolitical challenges into actionable solutions. Jane Carolan, Lighting Association of Ireland Leveraging Ireland’s local compliance WEE Board Representative, and Antoine Hattemer, Policy Officer, LightingEurope. achievements to inform EU governance, the event established a decisive mandate for cross-sector collaboration, robust enforcement, and enhanced resource resilience.

EFCA urges EU for stronger circularity framework in Europe’s built environment

Inés Ferguson, President, EFCA.

The European Federation of Engineering Consultancy Associations (EFCA) has issued a new position paper calling for an upgraded EU regulatory framework to accelerate circular economy practices across the built environment. With housing and infrastructure accounting for nearly half of global material extraction, EFCA emphasises that circularity is vital for resource security, resilience, and industrial competitiveness. Highlighting the pivotal role of engineers in driving this shift, Inés Ferguson, President, EFCA, stated: “By introducing circular approaches from the planning and design stages, consulting engineers have a huge impact on the use, performance, and resilience of the built environment. There

is an urgent need for better regulation, digital tools and common standards to fully realise the potential of circularity in the infrastructure sector and contribute to Europe’s strategic autonomy and competitiveness.” EFCA points to key industry barriers, including fragmented regulations, limited data transparency and procurement practices that favour lowest upfront cost over long-term lifecycle value. The paper advocates a clear mitigation hierarchy that prioritises reduction, reuse, repair and refurbishment before recycling or replacement. For building services engineers, EFCA’s stance reinforces the sector’s vital role in integrating whole-life asset performance, digital tools and sustainable design standards into everyday practice. To download the position paper, visit efca. eu/news

Pioneering for You

Building Services Engineering I January/February Building Services Engineering II March/April Building Services Engineering July/August 2026 37 Building Services Engineering I September/October

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NEWS AND PRODUCTS

Mitsubishi Electric Ireland unveils shortlist for Harmony Awards 2026

itsubishi Electric Ireland has announced the finalists across 12 categories for its inaugural Harmony Awards 2026, recognising technical achievement, sustainability, and innovation in HVACR, building services, and automation. An independent judging panel evaluated entries based on energy efficiency, carbon reduction, and system integration. Panel Chair Pat Lehane noted the “exceptionally high standard of industry expertise and collaboration”. Ciaran Moody, President of Mitsubishi Electric Ireland, praised the exceptional entry volume and quality for the inaugural Harmony Awards, congratulating all finalists and thanking the independent judging panel. The winners will be revealed at the ceremony on 19 November 2026. LIVING ENVIRONMENTAL (LES) COMMERCIAL CATEGORIES Excellence in HVRF System Installation This recognises projects demonstrating exceptional design, installation quality, commissioning and operational performance of HVRF systems. The shortlisted finalists are Mastertech (Chatham House); Eagle Air Conditioning (Trinity East Portal); and EcoCool Refrigeration Ltd (Pharma Manufacturing Facility). Sustainable Retrofit Project Award This celebrates projects that have transformed existing buildings through innovative low-carbon technologies and improved energy performance. The shortlist comprises Premier HVAC Services (Clayton Hotel); Harmon Group (One Grand Canal Parade); and Hoctor Refrigeration (Clochan House). Outstanding Hospitality Project Award This recognises excellence in hospitality environments where comfort, efficiency, guest experience and sustainability are paramount. The shortlist is Airflow Services (River Lee Hotel); Brian Scully Services (Europe Hotel & Resort); and Air Cool Engineering NI (Da Vinci Hotel). Outstanding Retail Project Award This category celebrates retail environments that showcase innovation, efficiency and customer comfort while delivering measurable operational benefits. The shortlisted finalists are Aherne Air Conditioning (Weir & Sons); Tech Refrigeration & AC (McCabes Pharmacy); and Anglo-Irish Refrigeration (Applegreen). LES RESIDENTIAL CATEGORIES Innovation in Residential Sustainable Heating This recognises installers who have embraced innovative sustainable heating solutions to improve comfort, efficiency and environmental performance. The shortlisted finalists are EVHACS (Ratoath); Heat Pumps Ireland (Fairview, Dublin 3); Kereen Building Services (Waterford). Climate Action Leadership Award This category honours projects making a significant contribution to decarbonisation and climate action through the adoption of low-carbon technologies and sustainable building practices. The shortlisted finalists are Allbrite (Beaufort Energy Efficiency Retrofit); Finn Heat Pumps Ltd (Cluid Housing Association Retrofit); and Beltech (Dundalk Golf Course). Social & Public Housing Retrofit Award This award recognises retrofit programmes that have delivered meaningful benefits to communities through improved energy efficiency, reduced carbon emissions and enhanced living conditions for residents. The shortlisted finalists are Finn Heat Pumps Ltd (Cluid Housing Retrofit); Allbrite (Beaufort Energy Retrofit Programme) ;

and Sola Energy Solutions (The Mall & Church Avenue Social Housing Retrofit Programme). LES APPLIED SYSTEMS CATEGORIES Commercial Decarbonisation Excellence Award This category celebrates organisations leading the decarbonisation of commercial buildings through innovative heating, cooling and energy solutions. The shortlisted finalists are Crossflow (Bank of Ireland); Greentherm (RDS Anglesea Stand Redevelopment); and Burlington Engineering (Cisco). CO₂ Heat Pump Pioneer Award This recognises projects that demonstrate leadership in the adoption of CO₂ heat pump technology and low-carbon heating innovation. The shortlisted finalists are EcoCool Refrigeration Ltd (Central Hotel); Astech Air Conditioning (UCC Brookfield); and TagAir (Loftline Apartments). Applied Systems Design Award This award celebrates excellence in system design, engineering integration and project execution across complex commercial and public sector applications. The shortlisted finalists Greentherm (Moxy Hotel); Astech Air Conditioning (Biomarin Laboratory Extension); and Quinn Downes (Portmarnock Residential Care Home). AUTOMATION & ROBOTICS CATEGORIES Robotics Excellence Award This award recognises robotics solutions that demonstrate innovation, productivity improvement, operational efficiency and engineering excellence. The shortlisted finalists are Ward Automation (Medical Device Manufacturer); AIR Sligo (Pharma Production Robotics Solution); and Ashdale Engineering (Pharma Manufacturer). Automation Solution Award This award celebrates automation projects that have successfully improved operational performance, productivity and sustainability through intelligent engineering and control systems. The shortlist comprises Ashdale Engineering Ltd (Glenmore Farm Anaerobic Digestion Plant); MPAC (Commercial Sawmill); and ECN Technologies Ltd (Regional Water Utility Area). To view the full shortlist, visit les.mitsubishielectric.ie/harmonyawards

Harmony Awards 2026 Judging Panel with President, Mitsubishi Electric Ireland: (l to r) Dr Keith Sunderland, Pat Lehane, Laura McMahon, Ciaran Moody, Paul Martin and Eamonn Sheils.

Building Services Engineering I September/October 2026 5

It’s pretty black and white Always check for gas pipelines before you break ground

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6 Building Services Engineering I September/October 2026

NEWS AND PRODUCTS H&MV Engineering to create 1,000 jobs in US grid expansion

H&MV Engineering CEO PJ Flanagan and Ken Gilmartin, EVP U.S., pictured with John Forde, Consul General of Ireland in Austin and H&MV colleagues and clients cut the ribbon on the Limerick, Ireland-based firms new North American headquarters at 3131 McKinney Avenue, Dallas, Texas.

Limerick’s H&MV Engineering has announced plans to create 1,000 US jobs as it scales to deliver the critical power infrastructure for America’s AI and data centre buildout, grid investment and expanding energy infrastructure. The global high-voltage engineering specialist has established its North America headquarters in Dallas, which will serve as a base for its growing engineering and project delivery operations across the country. H&MV has multiple projects in design and construction across the US, ranging from 138kV to 345kV, with Texas and Louisiana its most active markets. H&MV designs, builds and energises high-voltage substations and grid connections for hyperscale technology companies, utilities and energy developers. The 1,000 new roles are planned over the next five years as H&MV expands its US engineering, construction and project delivery capabilities, building on its existing Dallas presence and the acquisition of Texas-based Cooke Power Services earlier this year. PJ Flanagan, CEO, H&MV Engineering, said, “AI and data centre growth is putting huge focus on the need for power infrastructure, but the opportunity is much broader. Across the US, investment in the grid, renewables and battery storage is driving demand for new high-voltage infrastructure. That is exactly where H&MV specialises, and why we see the US as a major part of our next phase of growth.” H&MV’s US expansion comes amid rapid global growth, with revenues increasing from $70 million in 2020 to more than $1.1 billion today, and over 1,900 employees with offices spanning three continents.

Kirby Group doubles its South Africa workforce

Limerick-headquartered Kirby Group Engineering is doubling its South African workforce by opening a second office in Cape Town’s northern suburbs. The company is creating 50 new jobs, bringing its total headcount in the country to over 110 employees. Recruitment is open across several disciplines, including Mechanical, Electrical, MEP, Commissioning, and Structural Engineering. First established in South Africa in 2023, the firm’s growth highlights strong local opportunities. Executive Chairman Jimmy Kirby emphasised that the expansion reflects confidence in the region’s skilled talent pool. To nurture future engineering

Pictured (l - r): Doreen McKeown, Director for Sub-Saharan Africa, Enterprise Ireland; Austin Gormley, Irish Ambassador to South Africa; Jimmy Kirby, Executive Chairman, Kirby Group; Western Cape Premier Alan Winde; Henry McCann, CEO, Kirby Group; and Shamiela Solomons, Office Manager/HR Lead, Kirby Group South Africa.

talent, Kirby collaborates with institutions such as the University of Pretoria and the University of Cape Town through scholarships, sponsorships, and graduate development programmes.

Founded in 1964, Kirby now employs over 1,900 people globally across Ireland, the UK, Europe, the Nordics and South Africa.

Building Services Engineering I September/October 2026 7

Mitsubishi Electric Launches New CAHV-Z R290 Commercial Heat Pump For High-Temperature, Low-Carbon Heating New-generation commercial heat pump delivers up to 75°C flow temperatures, ultra-low GWP refrigerant and scalable performance for demanding retrofit and new-build projects.

itsubishi Electric Ireland has announced the launch of the new CAHV-Z R290 Commercial Air Source Heat Pump, a high-performance heating solution designed to help consultants, contractors and building owners accelerate the transition to lowcarbon heating while maintaining the performance and reliability required for modern commercial buildings. Developed for a wide range of applications including schools, hospitals, offices, hospitality buildings and large-scale residential developments, the CAHV-Z combines advanced heat pump technology with natural R290 refrigerant, offering an environmentally responsible alternative to traditional heating systems.

Driving down carbon throughout the building lifecycle As building regulations, sustainability targets and client expectations evolve the industry is increasingly focused not only on operational carbon but also on reducing the environmental impact of building systems throughout their lifecycle. The new CAHV-Z addresses this challenge by using ultra-low GWP R290 refrigerant, which has a Global Warming Potential (GWP) of just 0.02*. By utilising a natural refrigerant and reducing reliance on higherGWP alternatives, the system helps lower embodied carbon, supports corporate sustainability initiatives and future-proofs projects against evolving F-Gas regulations. Combined with highly efficient operation, the CAHV-Z provides a practical pathway for organisations seeking to reduce both carbon emissions and energy consumption. Andrew McEvitt, Applied Solutions Manager, Mitsubishi Electric Ireland, comments: “The transition to lowcarbon heating is one of the biggest challenges facing the building services industry. “The CAHV-Z has been developed to give consultants and installers a practical, commercially viable solution

that combines the environmental benefits of natural refrigerants with the high-temperature performance often required in commercial projects. It offers a clear pathway for organisations looking to decarbonise existing buildings while maintaining reliable heating and hot water provision.” Flexible performance for commercial projects Built on Mitsubishi Electric’s proven CAHV platform, the new CAHV-Z system combines high-temperature performance with advanced control capabilities, making it well suited to both retrofit and new-build applications. The unit delivers flow temperatures of up to 75C down to -15C outdoors, reducing supplementary heating and simplifying fossil fuel system replacement. A single CAHV-Z unit provides around 40kW of heating capacity, while up to seven units can be connected in cascade to deliver up to 280kW. Integrated cascade and rotation control allows the system to closely match building load requirements, improving seasonal efficiency while enhancing operational flexibility. A hermetically sealed monobloc design requires only electrical and water connections on site, simplifying installation and commissioning. Integrated R290 safety features, including leak detection and ATEXrated explosion-proof relay protection, support safe operation, while rapid defrost functionality and antisimultaneous defrost control help maintain continuous heating during challenging weather conditions. The system offers design flexibility through its wide operating range, providing water temperatures between 24C and 75C without electric boost heaters to lower operating costs and

complexity. Low Noise Mode and External Static Pressure Control add flexibility for noise-sensitive or spaceconstrained environments. High seasonal efficiencies, with SCOP values exceeding 4, combined with ultra-low GWP R290 refrigerant technology, enable designers to meet decarbonisation and net-zero objectives without compromising performance or reliability. The launch of the CAHV-Z reinforces Mitsubishi Electric’s commitment to supporting the industry’s move towards lower-GWP technologies and helping customers meet increasingly ambitious sustainability goals. The new CAHV-Z R290 Commercial Heat Pump is now available through Mitsubishi Electric Ireland and its network of approved partners. For more information, contact the Mitsubishi Electric Ireland commercial heating team or visit www.les.mitsubishielectric.ie/ products/heating/commercial *6th Assessment report (AR6)- IPCC

Mitsubishi Electric’s CAHV-Z R290 commercial heat pump.

8 Building Services Engineering I September/October 2026

NEWS AND PRODUCTS Inspiring tomorrow’s engineers: WorldSkills Ireland 2026

WorldSkills Ireland 2026 concluded at the RDS Simmonscourt in Dublin, with 40,000 students attending across its three days, 16 –18 September, showcasing technical careers and ways to tackle Ireland’s industrial skills shortage. The event featured over 160 finalists competing in 31 live National Skills competitions across key sectors including engineering, manufacturing, construction, automorive and digital technology. Attendees explored hands-on “Try a Skill” interactive exhibits while engaging directly with major industry partners such as SISK, ESB Networks and Irish Rail. The showcase reflects broader momentum in Ireland’s technical education sector, where registered apprenticeships have reached 31,169 across 88 specialised programmes. Employer participation has scaled to 10,400 companies, with female enrolment rising to nearly 10%. By benchmarking technical excellence on a national stage, WorldSkills Ireland serves as a critical bridge between industry and education, equipping the next generation of engineers and technicians with industry-ready capabilities.

Stonemasonry competitor, Megan Pepper.

European manufacturers back new digital product portal

Major construction manufacturers, including Saint-Gobain, Holcim, and Rockwool, have joined forces to launch the Manufacturers Information Hub (MIH) – a pan-European initiative designed to streamline access to verified product data. Navigating post-Brexit regulatory shifts, including CE marking, UKCA compliance and the EU’s emerging Digital Product Passport, presents growing challenges for building services engineers and specifiers. The MIH addresses data fragmentation by serving as a single, standardised gateway. Rather than functioning as a central database, the hub connects users directly to manufacturer-managed data through universal APIs. Melissa Zanocco, Challenge Director, Kickstart Economic Growth Mission, which

is funding the project, commented:“Reliable, direct access to manufacturers’ product information is an essential step in creating a more digitally connected construction sector.” Organised as a not-for-profit association, the initiative ensures equal voting representation for micro-businesses, SMEs, and major corporations alike. Backed by

UK Research and Innovation, the project aims to drive digital transformation and cross-border transparency. A working prototype is slated for early adopters in spring 2027, with a full commercial launch targeted for 2028. To learn more, visit themih.org

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Panasonic marks 15 years of CO₂ refrigeration as EU Regulations tighten the net on high-GWP gases Panasonic’s 15-year commitment to CO₂ places it at the forefront of a market now accelerating towards proven, lower-GWP refrigeration solutions.

rom 2027, the EU’s revised F-Gas Regulation will almost halve virgin HFC refrigerant supply, cutting quotas from 42.9 million to 21.7 million tonnes of CO₂-equivalent. For retailers, cold chain logistics, healthcare providers, and hospitality businesses running high-GWP systems, this increases pressure to adopt alternatives before availability tightens and prices surge. That pressure was reinforced on 17 July 2026, when the European Commission published its Electrification Action Plan, setting an indicative target of 46% electrification of final energy consumption by 2040 and committing to a dedicated EU Cooling and Heating Action Plan. For the refrigeration sector, the shift away from high-GWP gases is not an isolated F-Gas deadline, but one part of a much broader, structural move towards electrified, low-carbon heating, cooling and refrigeration units across Europe. Panasonic has prepared for this moment for decades: supported by a 65-year cold chain heritage, the company has developed CO₂ compressors since 2001 and now celebrates 15 years of innovation in CO₂ refrigeration units. This long-term commitment reflects decades of engineering expertise and is supported by measurable performance data, not a response to recent regulatory change. Enrique Vilamitjana, Managing Director, Panasonic Heating & Air Conditioning Europe, says: “We didn’t start developing CO₂ systems because a deadline forced our hand. We started because we could see where the industry needed to go, long before regulation caught up. That 15-year head-start is now the difference between retailers who are scrambling to find a replacement refrigerant and those who already have a proven one installed.” The Measurable Impact of CO₂ Refrigeration Panasonic research shows CO₂ systems cut freezer energy consumption by 25.4%, refrigeration energy by 16.2%, and total CO₂ emissions by 67% compared to former industry-standard R404A inverter units – banned in new EU equipment since

2020. Because newer low-GWP HFC/ HFO replacement blends involve efficiency trade-offs, CO₂’s energy savings may be even higher today than the original benchmark suggests. With proven performance across European climates and mounting regulatory pressure, industry priorities are shifting. As the sector gathers at ‘Chillventa 2026’ in Germany this October, the conversation among industry leaders, retailers, specifiers and the wider cold chain supply base will move from whether to plan a natural refrigerant transition to how quickly it can be done. A refrigerant older than the industry realises Although viewed as the future of low-carbon cooling, CO₂ (R744) was widely used in commercial and marine refrigeration from the late nineteenth century until the 1920s. It fell out of favour in the 1930s as synthetic refrigerants like R-12 were perceived as easier to handle and operated at lower pressures. Advances in compressor technology, intelligent controls and system design have made CO₂ a practical solution for modern cold chain applications. As a natural refrigerant with a Global Warming Potential (GWP) of just 1, CO₂ (R744) offers a climate-friendly alternative to conventional HFC and HFO synthetic refrigerants, enabling Panasonic to deliver sustainable refrigeration solutions at scale. For more information on Panasonic’s low-carbon heating, cooling and refrigeration solutions, visit https://aircon.panason

10 Building Services Engineering I September/October 2026

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Building Services Engineering I September/October 2026 11

Wilo Seals EcoVadis Platinum Status for Fifth Year Running Wilo secures its fifth consecutive EcoVadis Platinum status with a recordbreaking 91 points, placing the company in the global top 1% for corporate sustainability and value chain transparency.

ilo has retained EcoVadis Platinum status for a fifth consecutive year, achieving its highest-ever score of 91 points. The accolade, which places the business in the top 1% of companies assessed by the global sustainability ratings agency in the past 12 months, reflects the strength of its sustainability management system and commitment to promoting transparency throughout the value chain. This improvement was driven by external validation of Wilo’s non-financial indicators in line with EU sustainability reporting requirements, as well as its membership in the Partnering Against Corruption Initiative, launched by the World Economic Forum. The firm’s decision to expand supplier risk assessment and take several measures to manage conflict minerals also contributed to the record rating. Richard Swinburne, Managing Director, Wilo Ireland, said: “This recognition reflects our ongoing commitment to transparency, accountability and

Richard Swinburne, Managing Director, Wilo Ireland.

continuous improvement. We believe in doing the right thing for our people, our customers and future generations, and we will continue to evolve our approach as we strive for another high EcoVadis score next year.” Since launching in 2007, EcoVadis has assessed over 150,000 companies worldwide on criteria including risk and

supplier management, environmental awareness, labour conditions, ethics and sustainable sourcing. Oliver Hermes, President and CEO, Wilo Group, said: “Receiving the platinum award once again and achieving our new record score of 91 points are a clear indication of our unwavering commitment. “For Wilo, sustainability is not an isolated area of activity but, like AI, a cornerstone of our group strategy and therefore central to all our business activities. The fact that we have managed to improve on our already high score shows that we set the bar and are continuously evolving.” Discover more about Wilo’s EcoVadis recognition at https:// recognition. ecovadis. com/7HYEjDphlECzFloXOZPB0A or scan the QR code

12 Building Services Engineering I September/October 2026

NEWS AND PRODUCTS ‘Bringing Buildings Alive’: CIBSE Ireland’s essential building services podcast

In an industry defined by rapid technological shifts, staying ahead is a professional necessity. CIBSE Ireland’s flagship podcast, Bringing Buildings Alive, delivers a vital monthly tactical briefing for engineers navigating the modern frontiers of building services. Released on the first Monday of every month, the series moves beyond daily project grinds to explore practical, future-proof solutions. Current Episodes

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WELL and explains that WELL is for people, LEED for planet Light (Beyond The Lux): Prof Kevin Kelly and Dr James Duff (Arup) explore evidence-based, holistic lighting design. YEN Careers (Graduate Transition): Practical advice for new engineering graduates transitioning from academic theory to real-world practice: Dylan Ryan, Emma Hinch and Sean McMahon (CIBSE YEN). ESG in Engineering Decisions: Laura McMahon (CIBSE Ireland) and Kayleigh-Ann Myles (Lawler Sustainability) discuss site-level sustainability strategies. Harmonising EU Regulations: Gavin Edwards (Fagerhult), Elena Scaroni (Lighting Europe), and Dave Murphy (LAI) unpack net-zero lighting compliance. Ethical AI Adoption: Paul Tighe (Ethos Engineering) and Maryrose Lyons (AI Institute) map out autonomous engineering workflows.

• YEN Careers (Chartership Roadmap): Dylan Ryan (Euro Gas) and Max McClone (Mott MacDonald) discuss making professional development manageable. • WELL (Health in Design): Mona Duff (IWBI) discusses the New One

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CIBSE Ireland Winter Webinar Programme 2026 for building services professionals

Series 2026 commenced on 05 October 2026, providing building services engineers, energy professionals and industry stakeholders with a comprehensive programme of high-quality Continuing Professional Development (CPD) events delivered by leading manufacturers,

The CIBSE Ireland Winter Webinar

• Digital Buildings as a Process: Stephen Weir (Hereworks) and David Hegarty (Arup) break down smart infrastructure workflows. • Tallaght District Heating: John O’Shea (Codema) and James Porter (Euro Gas) showcase the successful reuse of data centre waste heat. Equip yourself with the essential market intelligence needed to design high-performing buildings. Stream and subscribe on Spotify, Apple Podcasts, or Podfollow: https:// podfollow.com/ cibse/view . Scan the QR code technical specialists and industry experts. The series features presentations from SOCOMEC UK, ILEA, Greentherm Ltd, Lindab, Wilo and OVIA, together with specialist technical sessions including CIBSE TM39 Metering and Monitoring, covering key topics such as uninterruptible power supplies, district heating systems, water boosting and surge protection, energy performance, monitoring and emerging industry developments. Additional CPD presentations and industry contributors will be announced throughout the programme. Full webinar details, speaker information and registration links are available via the CIBSE Ireland section of the CIBSE website at cibse.org, ensuring members and the wider building services community can access the latest technical knowledge and best practice from across the sector.

Building Services Engineering I September/October 2026 13

NEWS AND PRODUCTS Engineers Ireland appoints Áine Myler as Director General

Engineers Ireland has appointed Áine Myler as its new director general. She succeeds the outgoing director general Damien Owens, who will retire in December following 16 years with Engineers Ireland. Damien joined the organisation as registrar before becoming director general in 2022. With extensive leadership experience in professional and representative organisations, Áine Myler joins Engineers Ireland following more than four years as chief executive of the Charities Institute, the representative body for Ireland’s fundraising charities. She previously served as director general and registrar of the Society of Chartered Surveyors Ireland, where she worked closely with its board and council to strengthen professional standards, governance, and member engagement. Áine spent much of her earlier career as

a chartered surveyor, working within the built environment alongside engineers, planners and policymakers on infrastructure and development projects. Welcoming Áine Myler’s appointment, Dave Murphy, President, Engineers Ireland, said, “Áine brings significant experience leading professional organisations operating in the public interest, together with a strong understanding of the built environment and infrastructure sectors. Her experience working with governing bodies, strengthening professional standards, and engaging with members will be a valuable asset to Engineers Ireland.” Commenting on her appointment, Áine Myler said: “Engineering touches every part of our lives and is fundamental to Ireland’s future – from the infrastructure and technology we rely on every day to our ability to innovate, compete and respond to some of society’s biggest challenges. “I am delighted to join Engineers Ireland at a time when the skills, expertise and leadership of engineers have never been more important. I want to help ensure that

Áine Meyler, Director General Designate, Engineers Ireland.

engineering, across all its disciplines, has the profile and influence it deserves – that we continue to attract and develop the next generation of engineers, support the highest professional standards, and make the strongest possible case for engineering to be at the heart of decisions about Ireland’s education, infrastructure, and economic future. “I look forward to working with council, the team and our members to build on Engineers Ireland’s strong foundations, champion the profession and ensure that its collective voice is heard.”

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14 Building Services Engineering I September/October 2026

Versatile redefines radiator performance for the net-zero era – Driving smarter heating and building decarbonisation

he transition toward net-zero carbon in building design has firmly established heat pumps as the primary heat source for modern HVAC systems across Ireland and Europe. However, for building service engineers, designing around heat pumps presents a well-known operational challenge: operating effectively at low flow temperatures (typically 35°C to 45°C) without compromising system dynamics, control accuracy or visual spatial design. Traditional oversized steel panel radiators often fail to deliver the required heat output efficiently at low water temperatures, introducing high thermal mass, sluggish response times, and bulky spatial footprints that frustrate interior designers. Versatile net zero radiator range – perfect heat pump partners Versatile operates as a decarbonisation partner in helping to retrofit and upgrade domestic, commercial and educational buildings, including the supply of highly efficient radiators that operate with heat pumps. Versatile’s Net Zero Radiator Range bridges a critical performance gap. Engineered specifically as heat pump partners, these advanced lowtemperature emitters redefine what hydronic distribution can achieve in both commercial and residential applications. Dynamic Boost Hybrid technology At the core of this range is Dynamic Boost Hybrid (DBH) technology. By incorporating intelligent, micro-fanassisted convective boosting, DBH dramatically increases heat output without expanding the physical footprint

Versatile Net Zero Radiator (in red) – Rhe perfect heat-pump partner

heating and hydronic cooling within the same product portfolio. By utilising heat pumps capable of reversible operation, Versatile’s range delivers active winter heating and gentle sensible summer cooling through the exact same twopipe hydronic distribution network. This eliminates the need for redundant split air-conditioning units or complex ceilingmounted fan coil systems, significantly reducing embodied carbon, simplifying MEP coordination, and maximising usable floor area. System efficiency System efficiency is further amplified by ultra-low water content engineering. Containing up to 90% less water than standard radiators, these units require far less energy to heat or cool the circulating medium. The reduced system mass ensures near-instantaneous thermal response to occupant demand adjustments or rapid solar gains, aligning directly with Part L regulations and modern net-zero sustainability frameworks.

Versatile Net Zero Radiator (in red) – the radiator that heats and cools.

of the unit. This enables engineers to specify compact, slim radiators while maintaining full thermal performance at ultra-low flow temperatures. The resulting low thermal lag guarantees rapid warm-up times and precise roomby-room temperature modulation, directly protecting the heat pump generator from inefficient operational cycling. Furthermore, these units offer a gamechanging capability for modern building services: simultaneous capability for

Engineering excellence, aesthetic versatility From an architectural standpoint, engineering excellence is matched by aesthetic versatility. Available in sleek wall-mounted or fully concealed configurations, with a wide array of colour options, these radiators seamlessly blend into high-spec residential and commercial interiors. Building service engineers and specifiers no longer need to negotiate between heat pump efficiency, occupant comfort and architectural design standards. As decarbonisation targets tighten across the built environment, terminal emitter selection is no longer a secondary detail – it is the decisive factor in real-world system efficiency and seasonal COP. Versatile Ireland’s Net Zero Radiator Range provides building service engineers with a proven, futureproof solution that unites low-carbon heating, active space cooling, and uncompromised aesthetic appeal. To learn more, visit www.versatile.ie, phone 046 902 9444 or email sales@versatile.ie

Building Services Engineering I September/October 2026 15

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16 Building Services Engineering I September/October 2026

NEWS AND PRODUCTS

State shifting gear into critical infrastructure execution Speaking at this year’s Guaranteed Irish Construction Forum, the Minister for Climate, Environment and Energy, Darragh O’Brien, confirmed a hyper-aggressive infrastructure execution phase under PR6, defended data centres as Ireland’s heavy industry and guaranteed sustained demand for high-efficiency HVAC, specialised cooling and waste-heat recovery. ROBBE COUSINS reports.

t this year’s Guaranteed Irish Construction Forum on Infrastructure Delivery, hosted at KPMG’s Platform X facility in the IFSC, Dublin, the Minister for Climate, Environment and Energy, Darragh O’Brien, delivered a wide-ranging keynote address outlining the State’s strategy for critical infrastructure, grid expansion, planning reform and energy security. Balancing budget preparations and cabinet commitments, Minister O’Brien addressed key industry stakeholders, M&E contractors and construction leaders, delivering a clear message: Ireland will not “pull the shutters down” on hightech digital infrastructure, and the government is shifting gear squarely into an aggressive infrastructure execution phase.

Data Centres: Ireland’s heavy industrial sector Addressing ongoing European and domestic debate regarding electricity consumption, Minister O’Brien robustly defended the role of data centres in Ireland’s economic and technological landscape. Acknowledging that large energy users (LEUs) and ICT facilities currently consume approximately 23% of Ireland’s generated electricity, the minister contextualised this figure against continental Europe’s industrial baseline. Referring to his discussions with European counterparts at the Environment and Energy Councils in Brussels, he pointed out that unlike other European economies, Ireland does not have a large heavy manufacturing or automotive sector. The minister stressed, “ICT is our large industrial sector, and data underpins that. If we are going to

Minister for Climate, Environment and Energy, Darragh O’Brien speaking at the Guaranteed Irish Construction Forum.

continue to be competitive, to actually let Irish companies grow in that space – and we have great examples on the ICT side like Stripe - and to continue to be a leader in Europe and the world, that data needs to be captured and managed locally.” Rebuffing calls to restrict data centre development, the minister argued that capping digital infrastructure would simply displace investments to regions like the Middle East, Africa or southern Europe, while dismantling Ireland’s home-grown engineering ecosystem. He highlighted how domestic construction materials and building services companies have built world-class expertise and exportable services off the back of Ireland’s data centre buildout. North-South Interconnector & Grid Reinforcement Turning to power transmission, Minister O’Brien placed the longdelayed North-South Interconnector at the absolute top of the State’s

infrastructure agenda, calling it “the most critical piece of electricity infrastructure that the island will ever build”. Highlighting its systemic and economic benefits, the minister stated that the interconnector alone will significantly enhance grid resilience across the entire island and is projected to reduce domestic electricity bills by an average of €120 per household annually. Having passed three independent reviews, secured full planning permission and reached the final consent stage, Minister O’Brien reaffirmed strong political backing to push the project into physical construction, dismissing local political manoeuvring, assuring the audience, “The interconnector is designated as a priority flagship project under the Critical Infrastructure Act.” With national electricity demand projected to double between 2040 and 2050, the minister emphasised that grid expansion under Price Review 6 (PR6) is vital to enable the integration of indigenous renewable

Building Services Engineering I September/October 2026 17

energy. To maintain momentum, the minister confirmed he conducts monthly progress review meetings with ESB and EirGrid to track key transmission projects. Strong State backing was also reconfirmed for Gas Networks Ireland (GNI) to scale up biomethane injection into the grid. Transport, renewables and utilities pipeline Minister O’Brien provided operational status updates across several major national infrastructure projects: MetroLink: Following reforms to the Public Spending Code, the final business case was being brought to Cabinet, clearing the path for formal tender issuance. Target construction start is set for August/September 2027. The project is projected to yield €1.40 in economic return for every €1.00 invested, serving as a multibenefit driver for transport, urban housing and decarbonisation.

Greater Dublin Drainage (GDD): Construction has officially commenced, providing long-awaited wastewater capacity for the Greater Dublin Area. Solar & Wind Scale-up: Solar PV generation has expanded from 2MW a decade ago to passing 3.0GW on the grid recently (where 1 GW powers ~500,000 homes). Onshore wind capacity has doubled over the past decade, supplying up to 50% of grid power during key months in early 2026. Offshore Wind Target: Following the ORESS 1 auction, the focus is now on delivering “steel in the sea” across five Phase-1 East Coast offshore sites, targeting 4.9 GW to 5.0 GW of offshore wind generation prior to 2030. In conclusion Minister O’Brien gave the following assurances that will impact the

building services industry Grid reinforcements under PR6 and monthly ministerial oversight mean M&E consultants and contractors can anticipate clearer timelines for major commercial grid connections. Government commitment to data infrastructure ensures sustained demand for high-efficiency HVAC, specialised cooling systems, UPS systems and waste-heat recovery integration in the M&E sector. With solar passing 3 GW and offshore wind entering civil execution, building design must continue to prioritise rapid electrification, energy storage, and smart grid compatibility. By framing data centres as the nation’s primary industrial sector and committing heavily to the PR6 grid rollout, the State would appear to be effectively underwriting the M&E sector’s pipeline for the next decade. The mandate moving forward is no longer about waiting for capacity, but about delivering the highly technical execution required to sustain it. For M&E consultants, contractors and building designers, the future lies squarely in mastering highefficiency HVAC innovation, advanced cooling matrices and intelligent load balancing. As the State shifts its gears into an aggressive infrastructure deployment phase, the engineering community must now shift its own – transforming this massive influx of grid power into the smart, electrified and resilient building systems of tomorrow.

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INTERVIEW

From emergency medicine to indoor environmental quality: ASHRAE Ireland President Dr John McKeon Dr John McKeon, President of the ASHRAE Ireland Chapter and Principal, iAIR Institute, speaks with ROBBIE COUSINS about his journey from clinical medicine to building performance, his three-pillar strategy for the Chapter, and why he believes Ireland is particularly well positioned to contribute to the international conversation on healthy, resilient buildings.

hen Dr John McKeon assumed the presidency of the ASHRAE Ireland Chapter for the 2026-27 term, he brought with him a professional background rarely found at the head of a building engineering society. A medical doctor by training, his trajectory into building science and indoor environmental quality (IEQ) reflects a fundamental shift taking place across the global built environment: the growing realisation that buildings are not merely complex technical systems, but environments that directly impact human health, productivity, and wellbeing.

From the operating theatre to indoor environmental quality John opens by explaining the unique career path that brought him to where he is today, starting with an early career dedicated directly to patients and clinical practice, then moving to work with HVAC systems, airflow dynamics, and building physics. “My route into this world has been slightly unusual. I graduated in medicine from Trinity College Dublin and became a Fellow of the Royal College of Surgeons in Ireland (FRCSI).” His work increasingly drew him toward the intersection of human health and indoor spaces. Recognising the profound impact of indoor pollutants, allergens, and ventilation

on public health, he transitioned into entrepreneurship and biomedical research. iAIR Group, Airmid Healthgroup and ASHRAE “I founded the iAIR Group, which Airmid Healthgroup – a contract research organisation specialising in the science of indoor air airborne pathogens and health-centric product testing – is a part of.” Today John serves as Principal of the iAIR Institute and Medical Director of Airmid. This work naturally led him to ASHRAE, where he currently serves on the Environmental Health Committee and contributes to the ASHRAE Indoor Environmental Quality Center of Excellence, alongside contributions to international groups such as the International WELL Building Institute (IWBI) and the ISIAQ Innovation Task Force. He adds: “Engineering excellence, energy efficiency, decarbonisation and building performance remain fundamental to ASHRAE’s mission. Ultimately, we design and operate buildings for people. Indoor environment influences how we work, learn, recover, sleep and live. Ventilation, thermal comfort, air quality, acoustics and lighting all contribute to that daily human experience. My background allows me to bring a complementary, health-

Dr John McKeon, President of the ASHRAE Ireland Chapter and Principal, iAIR Institute.

focused perspective to the incredible engineering expertise that already exists within our chapter.” A three-pillar vision: Healthy buildings, stronger community, greater impact To guide the ASHRAE Ireland Chapter through his presidential term, Dr John McKeon has established a clear strategic roadmap summarised by three core themes: ‘Healthy Buildings’. ‘Stronger Community’ and ‘Greater Impact’. Healthy Buildings Ireland holds an extraordinary concentration of expertise across building services, construction, pharmaceuticals, life sciences, healthcare, data centres, and technology. Dr John McKeon sees a major opportunity for ASHRAE Ireland to act as the primary convening body bridging these sectors. “Healthy buildings are not a niche topic,” he comments. “They are increasingly part of the mainstream discussion about what good building performance actually means. I would like ASHRAE Ireland to provide a forum where engineers can engage directly with building scientists, researchers, clinicians, architects and manufacturers. The challenges facing the modern built environment – from indoor air quality

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to decarbonisation – are becoming far too interconnected for any single discipline to solve in isolation.” Stronger Community As a volunteer-led organisation, ASHRAE relies entirely on the dedication of industry professionals who give their time to mentor, educate and advance technical standards. A key priority for John is expanding early-career engagement, particularly through students and Young Engineers in ASHRAE (YEA). “For a student or young engineer, ASHRAE should not feel like a distant organisation sitting at arm’s length,” he notes. “It should feel like an accessible professional community they can enter, contribute to and grow within. That journey might start by attending a local evening technical presentation, but it can quickly lead to involvement in international technical committees, standards project groups, applied research and global leadership roles. We need to make that pathway as clear and inviting as possible.” Greater Impact The third pillar focuses on broadening the chapter’s reach beyond its traditional membership base and establishing stronger links with universities, state bodies and rapidly growing industry sectors. “Ireland is home to globally significant clusters in data centres, biopharma, advanced manufacturing and tech,” he highlights. “Many of the critical operational and environmental challenges facing those facilities intersect directly with ASHRAE’s technical research and standards. We want to ensure that value is visible, which is why we are putting renewed focus on our website, digital publishing, and LinkedIn communications to share technical knowledge and showcase our members’ work.” Connecting Ireland to international technical leadership A central aspect of Dr John McKeon’s vision is reinforcing the dynamic, two-way connection between Irish engineers and the global ASHRAE network. Representing Ireland at the 2026 Region XIV Chapters Regional Conference (CRC) in Timișoara, Romania, provided an opportunity to align Ireland’s goals with European

ASHRAE Ireland Chapter delegation at the ASHRAE European Chapters Regional Conference 2026 in Timișoara, Romania. (l-r) Howard Neville; Alireza Etemad; Dr John McKeon; Sarah Maston, President, ASHRAE; Eduardo Maldonado, Director and Regional Chair, ASHRAE Region XIV (Europe); Donal Finn; and Conor Murray.

and international chapters. “Standing in front of colleagues from across Region XIV to present the Ireland Chapter report was both a proud moment and a valuable exercise in articulating our ambitions,” he reflects. The Irish delegation in Timișoara included key figures such as Howard Neville, Conor Murray, Alireza Etemad and Donal Finn, with Conor Murray addressing the conference in his capacity as Regional Vice Chair for Chapter Technology Transfer. John was awarded a Region XIV Certificate of Appreciation for his fundraising efforts to secure sponsorship for the Region XIV dinner at the ASHRAE Annual Meeting in Austin, presented by ASHRAE President Sarah Maston and Region XIV DRC Eduardo Maldonado. “Formal presentations aside, the real value of these international gatherings comes from sharing practical solutions,” he says. “Whether it is sharpening student engagement, refining technical programming, or adopting successful sponsorship models, learning from peer chapters across Europe helps us elevate what we do in Ireland. The flow of knowledge must work both ways: bringing international best practice into the Irish market while ensuring Irish expertise helps shape global standards.” John represented the ASHRAE Ireland Chapter in March 2026 at the St Patrick’s Day global leaders breakfast in Washington, at which speakers included An Taoiseach Micheál Martin, the US and Irish Ambassadors, Enterprise Ireland’s CEO, and senior Amazon executives.

An invitation to the building services sector Looking ahead to the rest of 2026 and into next year, Dr John McKeon emphasises that the strength of ASHRAE Ireland rests on collective participation rather than individual leadership. “A presidency typically lasts just one year, and an organisation like ASHRAE is built by its volunteers and members. So my invitation to the industry for the year ahead is simple. If you are already involved in ASHRAE Ireland, step up your participation – attend an event, bring a junior colleague, mentor a YEA member or join a committee. “If you work in engineering, building services, facility management, architecture, life sciences healthcare, indoor environmental quality or semiconductors and advanced manufacturing and have not yet engaged with us, come and join the conversation. There is an immense amount we can accomplish together,” he concludes.

Attending the St Patrick’s Day business leaders breakfast in Washington: Dr John McKeon; Edward Walsh, US Ambassador to Ireland; and Dr John Ryan, Chief Strategy Officer, Allergy Standard.

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Beyond the Heat Pump: The Role of Hot Water Storage in System Performance

chieving optimum performance from residential heat pumps requires a whole-system approach, particularly regarding domestic hot water cylinders. Traditional cylinders were designed for high-temperature oil or gas boilers. Because heat pumps operate at lower flow temperatures, cylinders must feature larger, high-performance heat exchanger coils to maximise energy transfer. Improperly specified cylinders lead to slower hot water recovery, lower seasonal efficiency, and compromised user comfort. Cylinder Design and System Performance The cylinder is therefore a critical component within an integrated heat pump system. Coil configuration, heat-transfer surface area, insulation performance, standing heat loss and thermal stratification can all influence recovery rates, energy efficiency and hot water availability. According to Keith Scully, Training Manager at Grant, “The length, construction and surface area of the inner coil, together with the grade of insulation used, contribute to how effectively the cylinder works with a heat pump. By using a larger surface coil area and coil configuration, greater and more efficient heat transfer can occur within modern low-temperature heating systems.” These design principles informed the development of Grant’s new Quick Recovery Cylinder range. Engineered specifically for heat pump applications, the range features a high-surface-area heat exchanger coil and optimised cylinder geometry to facilitate faster heat transfer and enhanced domestic hot water recovery. The large internal coil is manufactured from DN25 stainless steel tubing to support rapid recovery, while high-performance insulation helps to minimise standing heat loss. Together, these features address the practical and technical requirements of modern low-temperature heating systems, supporting improved operational efficiency and lifecycle performance. A Whole-System Approach Grant’s approach considers the interaction between heat generation, domestic hot water storage and system controls, rather than treating each component in isolation. Grant developed the Quick Recovery Cylinder range alongside the Aerona R290 heat pump programme to ensure the products complement one another as part of an integrated heating solution. Close collaboration between Grant’s engineering teams enabled the heat pump and cylinder interface to be optimised, with heat-transfer performance, recovery rates and intelligent controls engineered to work together. Extensive testing also verified performance targets and supported reliable operation under real-world conditions. This coordinated approach is particularly relevant to Irish building services engineers, consultants and installers tasked

Keith Scully, Training Manager, Grant.

with delivering energy-efficient, low-carbon heating solutions for new-build and retrofit projects. Correct system design, hydraulic integration, product selection and commissioning are essential to achieving the intended performance outcomes. Available in capacities from 150 to 300 litres, the Quick Recovery Cylinder range includes standard, slimline, Smart preplumbed and Smart Integrated configurations. This provides specification flexibility across a broad range of dwelling types, plant-room layouts and residential applications. As Ireland continues its transition towards low-carbon heating and highly energy-efficient homes, individual system components cannot be considered in isolation. The interaction between the heat pump, domestic hot water storage, distribution system and controls is fundamental to achieving efficient operation. A correctly designed and specified cylinder can therefore play an important role in optimising heat pump performance, reducing standing heat loss, improving hot water recovery and supporting occupant comfort. This reinforces the importance of a coordinated, whole-house approach to heating-system design and specification from the earliest project stages. Learn more about Grant’s innovative product range at grant.ie. Follow Grant on LinkedIn @GrantEngineeringULC, Facebook @GrantIRL, Instagram @grant_irl or YouTube @GrantEngineeringIe

Building Services Engineering I September/October 2026 23

The smarter choice for heat pump systems Introducing the new Grant Quick Recovery cylinder range - designed and manufactured by Grant for seamless integration with the Grant Aerona R290 heat pump. Designed to support efficient low-temperature heating performance. - Rapid heat recovery - Optimised for low-temperature systems - Smart pre-plumbed options available - Seamless Aerona R290 heat pump integration - Backed by Grant technical support

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24 Building Services Engineering I September/October 2026

Cooling the Future brings the data centre industry together in Almere

arlier this month, Aalberts welcomed a small, hand-picked audience to the inaugural Aalberts presents: Cooling the Future forum, bringing together some of the data centre sector’s leading consultants, operators, contractors and technology providers for a day of discussion, knowledge sharing and collaboration focused on the future of data centre cooling. As a technical forum, the event was designed to encourage open dialogue around the challenges and opportunities created by AI-driven computing, increasing rack densities and the accelerating adoption of liquid cooling technologies. The conference featured six guest speakers, with representatives from NVIDIA, Vertiv, Switch Datacenters, Pure DC, Haskoning and Arup, who shared their perspectives on liquid cooling adoption, operational challenges and the future of data centre infrastructure. The agenda also included two panel discussions, with contributions from panellists representing companies including Microsoft, CoolIT Systems, Springtide and Ethos, creating lively debate and valuable insight from across the industry. The event was truly international, with guests travelling from across the globe, including Ireland, the United States, the United Kingdom, Germany, France, the Netherlands, and more. The diversity of backgrounds, experiences and project perspectives created a rich environment for discussion and underlined the growing importance of global collaboration as the industry adapts to new cooling demands. Naturally, there was a strong Irish presence, representative

of the strong influence that the island has on the data centre world, with delegates from across the data centre building lifecycle in attendance - from design to delivery. The afternoon programme moved from discussion to interaction through a technical carousel session, where attendees rotated through a series of expert-led demonstrations and discussions. The stations were led by experts from across the Aalberts group and included topics such as prefabrication of both Technology Cooling System (TCS) skids and mechanical plantrooms; water treatment and integrated piping systems The event experience extended beyond the conference itself. On Thursday evening, attendees joined a canal boat cruise through Amsterdam, providing a more informal setting for networking, relationship building and continued discussion among attendees. The following morning, delegates visited an Aalberts advanced mechatronics facility, gaining a fascinating insight into the technologies, manufacturing expertise and innovation capabilities that support Aalberts businesses across multiple industries. All in all, a fantastic event, with deep learning for all involved, as well as insight as to how Aalberts solutions can seamlessly integrate into the data centre landscape, improving efficiency within data centres and helping buildings to reach their targets and goals. To learn more about mission-critical cooling technologies, visit aalberts.com Or contact Austin Kennedy, Sales Director Ireland & NI M +353 87 470 0015 Austin.Kennedy@aalberts-hfc.com Stuart Harron Data Centre Commercial Director M +44 7740 449861 stuart.harron@aalberts-hfc.com Scan the QR code to watch the event highlights reel.

engineered solutions

advantages of Aalberts hfc engineered solutions: optimum system design seamless system integration speed of build cost saving compliance and support

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26 Building Services Engineering I September/October 2026

SOCIAL

Fairways and friendly rivalry at the CIBSE Ireland Annual Golf Outing 2026 Sponsored by Daikin | Photos: Tom Coakley

espite early shower warnings, ideal playing conditions greeted a record 26 teams of building services engineers and specialists at the annual CIBSE Ireland Golf Outing, hosted once again at Luttrellstown Castle Town and Country Club. The tournament followed the popular scramble format with a shotgun start, bringing all players off the course at the same time. While the fairways were in pristine condition and the competitive edge was real, the main focus remained on catching up with old friends and making new acquaintances. The outing offered a great mix of returning stalwarts and enthusiastic newcomers a chance to catch up and make new connections. Organisers James Porter, Paul Tighe, Stevie Young, Dylan Ryan and Pat Lehane kept the day running smoothly. Title

The winners, Team CIBSE Ireland: David Kelly, Stephen Weir, Paul Tighe and and Johan van Vuuren.

CIBSE Ireland committee members – Standing (l-r): Dylan Ryan, Stevie Young, Gavin Edwards, Stehphen Weir and James Porter. Seated (l-r): Paul Tighe, Laura McMahon and Pat Lehane.

Michael Donoghue, Laura McMahon, Liam Kirwan and Paul Tighe.

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Team WiBSE.

Team BTU.

Team Grundfos.

sponsor Daikin fielded two teams, but the CIBSE Ireland squad set the benchmark early and ultimately took home top honours, followed closely by Jones Engineering and Versatile. A strong lineup of industry firms competed, including ATC Systems, BTU Golf Society, Burlington Engineering, C&F Quadrant, CIBSE Ireland, Daikin, Davies, Delap & Waller, EICL, Euro

Gas, Grundfos, Hevac, IN2 Engineering, Jones Engineering, Lindab, Mitsubishi Electric, Panasonic, Sisk, Versatile, WiBSE and Wilo. The day concluded with a buffet dinner and prize-giving ceremony. CIBSE Treasurer James Porter thanked everyone for the impressive turnout and acknowledged Daikin’s vital support, light-heartedly noting that missing out on playing for the winning CIBSE Ireland team this year might jeopardise his chances of making the cut next year. Results • 1st Place: CIBSE Ireland (nett 56.3) • 2nd Place: Jones Engineering (nett 57.5) • 3rd Place: Versatile (nett 58.5) • Nearest the Pin (4th Hole): Tony Ptohopoulos • Nearest the Pin (15th Hole): Damian Murphy • Longest Drive (9th Hole): Daniel Lynch The CIBSE Annual Golf Outing 2027 is set to take place on Friday, 27 August 2027. Scan the QR code to view a full gallery of photos from the day.

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Why a waterless trap makes sense for MVHR condensate drainage With more MVHR units being installed in attic spaces, Wavin explains why a waterless valve like HEPvO offers a practical advantage over conventional traps when managing condensate drainage.

hy does MVHR condensate drainage need particular consideration? MVHR systems generate condensate when warm, moisture-laden extract air is cooled as it passes through the heat exchanger, and that condensate needs to be safely drained away. Technical Guidance Document F – Ventilation (TGD F), which provides guidance on complying with Part F of the Irish Building Regulations, states that installed heatrecovery units should have condensate drains fitted and the pipe insulated where passing through unheated spaces. The particular challenge with MVHR is that condensate production is not constant. During warmer summer periods, when internal and external air temperatures are closer, significantly less condensate may be generated. At the same time, attic temperatures can rise considerably, increasing the risk that the water in a conventional trap evaporates. Why can a traditional U or P trap be a weak point? Traditional traps depend on standing water to maintain the seal between the foul drainage system and the MVHR unit. Many MVHR units are located in attic spaces, which can become particularly warm during summer. A combination of higher attic temperatures and periods of low condensate flow can cause the water held within a conventional trap to evaporate gradually. Once that water seal is lost, foul or contaminated air can travel back through the condensate connection

towards the MVHR unit and into the living space. There is also a practical maintenance issue. An MVHR unit located out of sight in an attic can easily be forgotten, so a traditional trap that requires checking and refilling may not receive regular attention. What makes HEPvO such a strong solution? Wavin HEPvO removes the reliance on standing water. Its self-sealing elastomeric membrane opens to allow condensate to discharge and then closes to create an airtight seal. There is therefore no water seal to evaporate and no requirement to keep a conventional trap topped up simply to maintain that barrier. For an MVHR unit installed out of sight in an attic, that removes a potential maintenance issue that might otherwise be easily overlooked. HEPvO has also been performance tested under negative-pressure conditions and demonstrated suitability as an air lock for heat-recovery condensate drainage at negative pressures up to -4 kPa. What should installers consider? Attic installations bring winter considerations too. Any condensate pipe passing through an unheated void or area that could fall below 4°C should be insulated to prevent freezing. Wavin angled adaptors feature a 2.5° angle to help maintain the required fall. Wavin HEPvO can also be installed horizontally or vertically. Where space is restricted, horizontal installation provides a compact option and is usually preferred for maximum space saving. Wavin also recommend flushing the valve through before installation. The valve requires a minimum of 50100mm head of water to open the valve on its first flush, after this first flush, only 15mm of water is required to open the valve, in standard operating conditions. Can HEPvO be used in other condensate applications? Yes. Applications include HVAC, airconditioning, mechanical ventilation, heat-recovery systems, dehumidifiers and condensate drainage from boilers. For more, see Wavin.ie or scan the QR code

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30 Building Services Engineering I September/October 2026

EVENTS Hitachi, TF Solutions and Aliaxis triumph at the Annual BSS Golf Day

Over the course of a long, warm summer, BSS hosted its highly anticipated annual golf day at the picturesque Newlands Golf Club in Dublin. The event brought together key figures, clients and partners from across the building services engineering sector for a day of superb networking and competitive golf. High-profile attendees hitting the greens included Josephine Crowe, Managing Director of BSS, and James Boswell, Managing Director of TF Solutions, alongside a strong turnout of BSS’s valued customers. The fairway saw fierce competition from prominent industry teams, including representatives from JCPS, Laminar Engineering, PJ Duffy, Master Tech,

Gaffney Mechanical, Burlington Engineering, Advanced Technical Products and Designer Group. When the final cards were submitted, David Green from Hitachi emerged as the overall winner of the event, delivering a standout performance on the Dublin course. The individual category honours were claimed by a roster of familiar industry names: • Overall Winner: David Green, Hitachi • Class 1 Winner: Ken Clare (BSS) • Class 2 Winner: James Boswell (TF Solutions) • Class 3 Winner: Scott Conaghan (Aliaxis) • Ladies 1st Place: Josephine Crowe (BSS) • Ladies 2nd Place: Marian Gallagher (JCPS) The tournament was made possible through the vital backing of key trade partners, with the event proudly sponsored by Aliaxis, Victaulic, Hitachi, and Diversitech. Reflecting on the day’s success, BSS

Brendan Coghlan claims victory at BTU Golf President’s Day

Clontarf Golf Club hosted the annual BTU Golf Society President’s Day on 04 September, delivering a memorable day of sport and camaraderie. Society President Dave Daly welcomed members and guests to his home club, setting a warm tone for the outing over morning coffee and scones. The event was generously sponsored by industry partners BSS and Geberit. The course was presented in excellent condition, benefiting significantly from heavy rain following a prolonged dry spell. Though golfers navigated a few brief passing showers, the weather failed to dampen spirits on a standout day on the fairways. Celebrations concluded with an evening dinner in the club

dining room, followed by speeches from President Dave Daly and sponsoring representatives. Derek Murphy of BSS and Kevin Doyle of Geberit took to the podium to present the awards to the day’s winners. Brendan Coghlan claimed top honours, securing the coveted President’s Prize as overall winner with a fine score of 33 points. He was also Nearest to the Pin on the 15th Hole. RESULTS Category Overall winner Brendan Coghlan Class 1 Winner: Brian Harrison Second: Tom Sheridan Class 2 Winner: Shay Kiernan Second: Dave Cranston Class 3 Winner: Jim Bollard Second: John Littlefield

Visitors Winner: Stuart Hayden Second: Tony Murphy Front 9: Frank Lynch Back 9: Brian Hennessy Overall winner Brendan Coghlan receives his trophy from BTU Golf Society President David Daly.

Managing Director Josephine Crowe expressed her gratitude to everyone involved: “I would like to extend my sincere thanks to all of the participants who joined us at Newlands Golf Club and made this year’s golf day such an enjoyable and competitive event. We are also incredibly grateful to our sponsors – Aliaxis, Victaulic, Hitachi, and Diversitech – whose continued generosity and support are instrumental in bringing our industry community together.”

Handicap 32

Points 33

09 10

27 26

15 17

28 27

20 20

31 31

13 28 27 24

32 25 16 17

Nearest the pin: Shay Kiernan (Hole 6); Brendan Coghlan (Hole 15)

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THE SPACE RACE

The Vaillant aroTHERM plus – Redefining R290 Siting: The Vaillant aroTHERM plus Advantage

or Irish building services engineers, R290 (propane) has established itself as the premier natural refrigerant for residential heat pumps. Combining an ultra-low Global Warming Potential (GWP) of just 0.02 with high flow delivery temperatures up to 75°C, it provides an ideal pathway for decarbonising both new-build developments and existing housing stock. However, the physical reality of propane’s flammability traditionally presented significant spatial constraints. Standard R290 monobloc installations required a strict one-metre exclusion zone around the outdoor unit in every direction to eliminate potential ignition sources and prevent heavier-than-air gas from pooling near building openings. On typical Irish urban and suburban retrofit projects – where boundary walls, narrow side passages, and patio doors are common – this spatial requirement frequently ruled R290 out. Enhanced Vaillant aroTHERM plus The newly enhanced Vaillant aroTHERM plus directly addresses this design barrier through Vaillant’s Flexible Space Function (FSF). Moving beyond purely passive distance clearance, FSF introduces an active safety protocol. In the unlikely event of a refrigerant leak, the system maintains controlled air movement

around the casing to actively dilute and disperse propane before flammable concentrations can accumulate. Commissioned via the installer setup, FSF dramatically reduces the required protection zone to a minimal 100mm above the base of the outdoor unit. This enables specifiers to site units close to doors, windows, and property boundaries with complete safety compliance. Engineers should note that the outdoor unit must remain continuously powered for active dispersal protection to function. From 3.5kW to 12kW outputs Available in outputs ranging from 3.5kW to 12kW (with three-phase variants on 10kW and 12kW models), the aroTHERM plus offers exceptional flexibility. Key features include super-quiet operation

at only 44 dB(A), an intuitive AI semitouch controller, and factory-fitted integrated cooling capabilities for underfloor installations. Full technical support and a seven-year warranty As exclusive Irish agents celebrating a 50-year partnership with the Vaillant Group, C&F Quadrant recently marked the system’s launch at Dublin’s Guinness Storehouse. When paired with Vaillant’s high-recovery uniSTOR cylinder – featuring enhanced 50mm to 60mm insulation and internal expansion vessels – installers can deliver extended sevenyear heat pump warranties and 25-year anti-corrosion tank guarantees. Supported by C&F Quadrant’s comprehensive stock, dedicated training facilities, and nationwide technical backup, the aroTHERM plus sets a new benchmark for R290 engineering in Ireland. To learn more, contact C&F Quadrant, Tel: +353 (0)1 630 5757 Email: sales@ cfquadrant.ie Web: www.cfquadrant.ie.

32 Building Services Engineering I September/October 2026

FOCUS

EU proposes public procurement overhaul: ‘Buy European’ push and lighting industry reaction

he European Commission has proposed a modernised public procurement regulation to streamline EU investments across infrastructure, transport, energy, education and healthcare – a sector representing roughly 15% of EU GDP. Central to the initiative is an integrated digital marketplace linking national eProcurement platforms. By simplifying procedures, the proposal is projected to save €650m annually, reducing administrative burdens by €80m for public buyers and €570m for businesses. Strategic sourcing: ‘Buy European’ supply chain incentives European authorities will be encouraged to buy more domestic goods and services. The Commission has proposed the major overhaul of public procurement rules to strengthen domestic supply chains and counter Chinese economic dominance. The updated “Buy European” framework encourages public bodies and state-funded institutions to prioritise Europeanmanufactured equipment, components and engineering services. Crucially for regional contractors and suppliers, the policy relies on

preferential sourcing incentives rather than legally binding “made in Europe” content quotas, marking a softer approach than previous clean-tech mandates. LightingEurope response On the finer details of the proposed procurement rules, LightingEurope has welcomed the EC’s proposal to shift from directives to a regulation. Elena Scaroni, Secretary General, LightingEurope, commented: “It is an important step toward harmonising procurement rules across the Single Market. However, we should review the significant discretion left to member states and local authorities, which risks reintroducing the very fragmentation that the change in legal instrument is meant to eliminate. “We are also concerned about provisions allowing public buyers to request specific labels. This, too, could further fragment the Single Market,” she added. Life-cycle costing and indoor environmental quality On non-price criteria, LightingEurope welcomes the recognition of quality, social, innovation and environmental

factors. It stresses the importance of recognising quality criteria for lighting, such as its contribution to indoor environmental quality, within the technical specifications for the public procurement of lighting products. On green public procurement, LightingEurope supports the recognition of life-cycle costing and the inclusion of green public procurement as a central element of the strategic considerations for public buyers. “We believe, however, that demand for sustainable lighting products will be most effectively driven by establishing mandatory sustainability criteria for public buyers. They will provide greater investment and planning security for sectors in which public procurement is a major economic driver, such as ours,” Elena Scaroni concluded. Next steps The European Parliament and the Council of the European Union will negotiate the proposed regulation before it is adopted and enters into force.

Building Services Engineering I September/October 2026 33

THE SPACE RACE

The Glow-Worm GeniaAIR – “Without the Faff”: How Glow-worm’s GeniaAIR Unlocks R290 Retrofits

s the Irish heating sector works to meet ambitious national carbon reduction targets, specifiers and contractors require heat pump systems that combine clean technology with practical, cost-effective installation. Positioning itself firmly under Glowworm’s “Without The Faff” design philosophy, the new GeniaAIR air source heat pump brings high-efficiency R290 propane performance to the mainstream Irish housing market without the spatial friction traditionally associated with natural refrigerants. Historically, R290 heat pump deployment was restricted by mandatory one-metre clearance boundaries around outdoor units. Because propane is heavier than air, guidelines mandated keeping electrical sockets, switches, windows and basement vents clear of the unit’s immediate perimeter to prevent flammable pooling in accordance with the fire triangle. In typical Irish residential retrofits – characterised by tight gardens and close property boundaries – finding an unobstructed metre in all directions often proved impossible. Glow-worm GeniaAIR The Glow-worm GeniaAIR overcomes this hurdle by incorporating the Vaillant Group’s Flexible Space Function (FSF) technology. Easily activated through

the MiPro Sense control wizard during system commissioning, FSF utilises active fan dispersal to continuously manage airflow around the unit. This active ventilation disperses escaping refrigerant long before it can reach a combustible threshold, shrinking the required clearance envelope into a compact, manageable footprint. Specifiers must ensure the outdoor unit maintains a continuous electrical supply so that the active dispersal fan mechanism remains operational at all times. Available in 5kW, 7kW and 11kW models Engineered specifically to ease the physical burden on installation teams, the GeniaAIR range spans 5kW, 7kW, and 11kW models. A key highlight for contractors is unit weight: the 5kW model weighs just 84kg, vastly simplifying transport, lifting and positioning on site.

Inside the property, the GeniaAIR pairs seamlessly with Glow-worm’s frontfacing HydraCyl cylinder for a clean, space-efficient hydraulic footprint. Full technical support and a five-year warranty Distributed exclusively in Ireland by C&F Quadrant, the GeniaAIR is backed by full technical training, extensive local stock holding, a five-year warranty and comprehensive nationwide engineering support. Delivering flow temperatures up to 75°C alongside high seasonal efficiency, the GeniaAIR provides Irish specifiers and installers with a straightforward, hassle-free path to R290 adoption. To learn more, contact C&F Quadrant, Tel: +353 (0)1 630 5757 Email: sales@ cfquadrant.ie Web: www.cfquadrant.ie.

34 Building Services Engineering I September/October 2026

CIBSE IRELAND

Unlocking engineering talent: How group chartership builds momentum and culture

cross the building services sector, engineering leadership universally recognises the value of CIBSE Professional Registration. Achieving Chartered status provides a globally recognised benchmark of technical competence across 18 core competencies. However, engineering firms frequently run into a familiar hurdle: busy engineers naturally prioritise urgent client deliverables, leaving their professional registration sitting on the back burner. To bridge this gap between intention and action, CIBSE developed the Company Registration Package (CRP) – a structured framework designed to move cohorts of engineers through the registration process together under one coordinated timeline. The experience of Kilkenny-based Lawler Group demonstrates how its approach can help transform professional development across an entire firm. From individual isolation to shared momentum When Lawler Group enrolled 10 of its engineers into the CIBSE Company Registration Package, their primary objective was to establish a structured environment where engineers felt supported rather than left to navigate the journey alone. By uniting the group around a single timeline, individual delay gave way to collective drive. Lawler Group contends chartership is not about proving an engineer is “good enough”; it is about recognising the competence and experience already built throughout a career. The CIBSE process effectively supports both academic and experience-based routes, ensuring that talented engineers from diverse backgrounds are fully accommodated. Operational efficiency and cultural impact From an administrative perspective, managing one company package is far simpler and more efficient for leadership than overseeing 10 separate individual applications. Throughout the journey, Lawler Group’s cohort has benefited from regular check-in meetings with the CIBSE membership team as well as voluntary pre-submission reviews, giving candidates clarity and confidence before submitting. However, Lawler Group found the most significant dividend of cohort enrolment is cultural. Pursuing a shared goal fostered deep cross-company collaboration, prompting engineers to reflect on past projects, overcome technical challenges and share insights across the business. Externally, the commitment reinforces client confidence in the firm’s technical standards while signalling to prospective employees that the business actively invests in clear career development pathways. Tangible outcomes The results at Lawler Group speak for themselves: out of 10 enrolled engineers, five submitted their Chartered Engineer applications in the first wave, with the remaining five progressing rapidly behind them. Crucially, the initiative established a repeatable, sustainable development model that

Some of the 10 Lawler Group engineers on route to achieving chartership: (l-r) Ilyass Hlioua, Nihat Asay, Luke Coulter, Lina Iaremenko and Jonathan Culleton.

the firm can roll out year after year. While the administrative benefits are substantial, the true return lies in creating a culture of shared achievement and recognised expertise – a benefit that is difficult to put a price tag on. Make the chartership call For engineering and consulting firms aiming to elevate technical standards, enhance team cohesion and attract toptier talent, enrolling groups of engineers in CIBSE charterships offers an unmatched framework for growth. Don’t let your engineers’ professional registration sit on the long finger any longer. Save time and cut costs by choosing group registration over individual applications. By achieving Chartered status together, your engineers will build a more powerful team dynamic and elevate their shared potential. To learn how the CIBSE Professional Registration can work for your team, visit cibse.org/membership-registration

Building Services Engineering I September/October 2026 35

WiBSE Ireland committee (l - r) Mona Duff, Niamh O’Halloran, Heather Holt, Sarah Boylan, Christy Faul, Anna Rooney and Laura McMahon.

SOCIAL

A memorable evening along the Grand Canal - WiBSE Ireland networking dinner

early 50 women, including some of Ireland’s leading building services engineers, recently gathered for a memorable WiBSE Ireland networking dinner. The night was one of connection, celebration and conversation aboard La Peniche Barge, where the setting couldn’t have been more idyllic, with late-afternoon sunlight dappling softly through the leaves along Dublin’s Grand Canal. The evening began at the Mespil Road moorings on the MV Riasc Barge, where guests enjoyed a vibrant drinks reception before settling in for a sumptuous meal. As the barge gently navigated the historic waters, the evening unfolded into a captivating cruise. Guests passed through traditional hand-cranked lock gates and marvelled at Dublin’s evolving skyline - including new modern architectural landmarks. The atmosphere aboard was electric from start to finish. Shared achievements, fresh perspectives and spirited discussions echoed across the water as many of Ireland’s

top engineering talent reconnected and built new bonds. Welcoming the attendees, Heather Holt, Chair of WiBSE Ireland and Niamh O’Halloran Vice Chair of WiBSE Ireland, paid warm tribute to the women in the room, joined by Laura McMahon, Chair of CIBSE Ireland and the WiBSE Ireland committee. Speaking to ‘Building Services Engineering’ magazine, Heather acknowledged the support of Mitsubishi Electric and CIBSE Ireland, highlighting the vitality of the gathering: “It was an honour for WiBSE Ireland to host so many fantastic female role models at one of the largest WiBSE Ireland events to date. It is great to see the work that the WiBSE Ireland committee has done over the last number of years continue to bring women within the industry together and grow in numbers.” Framed by great weather, rich history and brilliant company, the WiBSE Ireland networking dinner will be remembered as a glowing testament to the women shaping the future of Ireland’s built environment.

36 Building Services Engineering I September/October 2026

From dust to direct-to-chip – Rethinking environmental risk in the AI data centre As AI drives extreme rack densities, data centres are transitioning from simple air cooling to complex, liquid-enabled thermal ecosystems. ASHRAE Ireland Chapter President and iAIR Institute Principal DR JOHN MCKEON examines how new 2026 guidelines require operators to manage the combined electrical, liquid and environmental risks across both legacy and next-generation infrastructure.

or years, data centre environmental management was largely a story about air temperature, humidity, filtration, dust and corrosive gases. Those risks have not disappeared. But AI is changing the physical architecture of the data centre so quickly that the old model is no longer enough. The latest ASHRAE guidance points to a new era of liquid cooling, integrated power and thermal design, water stewardship, accelerated commissioning and continuous performance validation. The data centre sector is used to rapid change, but the current shift is different in scale. In June 2026, ASHRAE, the Pacific Northwest National Laboratory (PNNL) and the National Electrical Manufacturers Association (NEMA) released a new ‘PNNL/ASHRAE/NEMA AI Data Center Energy Performance Framework’ for next-generation facilities. This builds on existing codes and standards, providing a living bestpractice framework spanning planning, design, commissioning, operations and retrofit. Its significance is that it reflects the physical consequences of the AI boom: extreme rack densities, fast-changing loads, liquid cooling, grid interaction and water constraints, as well as a much tighter relationship between electrical and mechanical systems. As President of ASHRAE Ireland, I have been following the development of this framework closely. Its implications are particularly direct for Ireland, where data centre capacity has grown faster than almost anywhere else in Europe. I attended

Dr John McKeon, President of the ASHRAE Ireland Chapter and Principal, iAIR Institute.

the ASHRAE Annual Conference in Austin, Texas, in June 2026, where the launch of the new PNNL/ASHRAE/NEMA AI Data Center Energy Performance Framework was among

The old model and the emerging model

Traditional data-centre model

Emerging AI / HPC model

Air is the primary heat-transfer medium; hot-aisle/cold- Direct-to-chip liquid cooling and hybrid air/liquid architectures move heat aisle management and fan energy dominate the thermal removal much closer to the processors. conversation. Temperature, humidity, particulates and gaseous contamination define much of the environmental risk envelope.

Those risks remain, but coolant quality, materials compatibility, leak management, CDU performance and thermal resilience are added to the risk picture.

Power and cooling can often be designed as adjacent disciplines.

Power and cooling increasingly must be designed as one interdependent system.

Commissioning validates a relatively stable design intent. Technology can change during the project itself, so commissioning feedback, controls and performance validation must move faster. PUE is a dominant efficiency metric.

Energy, water, grid flexibility, useful IT work and resilience are increasingly considered together.

Building Services Engineering I September/October 2026 37

the headline announcements and the pace of change in AI infrastructure dominated the technical programme. ASHRAE now describes AI and high-performance computing facilities as a distinct design paradigm. Rack densities that only recently seemed exceptional are moving from roughly 120 kW into the several-hundred-kilowatt range, with megawattclass racks anticipated. At that point, the traditional idea of designing the electrical system, the cooling system and the IT environment as separate disciplines becomes increasingly difficult to sustain. The old risks have not gone away It would be a mistake, however, to read the arrival of liquid cooling as the end of air-quality management. Most data centres are not becoming homogeneous liquid-cooled environments overnight. Conventional CPU-based workloads, storage, networking and ancillary equipment will remain air-cooled for years, while many new facilities will combine high-density liquid-cooled AI zones with traditional air-cooled infrastructure. In other words, the industry is moving into a hybrid period in which the established contamination risks remain relevant even as a new set of liquid-side risks emerges. Particulate contamination remains a basic reliability issue. In air-cooled equipment, very large volumes of air pass through server chassis. Dust and fine particles can accumulate on heat sinks, fans and circuit boards, impair heat transfer, increase fan demand and contribute to local hot spots. Conductive contamination is more serious again: carbon fibres, metallic debris or zinc whiskers can bridge electrical paths and create short-circuit risk. Gaseous pollutants and moisture accelerate copper and silver corrosion in electronics. Lead-free assemblies, component miniaturisation, and outside-air economisation make local contamination monitoring essential – temperature alone does not define safety. ASHRAE references ISO 14644-1 Class 8 for particulate cleanliness and copper/silver coupons for gaseous severity. If twice-yearly testing shows corrosion under 300 Å/month (copper) and 200 Å/month (silver), operation up to 70% relative humidity is acceptable. Exceeding these limits, or failing to test routinely, requires lower humidity thresholds. What AI changes: heat has moved closer to the chip High AI and HPC densities exceed air cooling limits, making direct-to-chip liquid cooling a mainstream architecture in ASHRAE’s 2026 Framework. Attaching cold plates directly to processors transfers heat into a liquid loop rather than relying on room air. This alters the engineering boundary. Coolant distribution units (CDUs) now serve as critical interfaces, placing fluid chemistry, pressure, material compatibility and leak detection right next to multi-million-euro equipment. ASHRAE TC 9.9 has been moving rapidly to standardise this new landscape. Its liquid-cooling guidance now uses revised facility-water classes W17, W27, W32, W40, W45 and W+, with the number corresponding to the upper facility-water temperature for the class. Higher-temperature liquid cooling can open the door to warm-water operation, more dry-cooler use and reduced dependence on mechanical refrigeration. TC 9.9 has also been developing and extending “S” classes that address the supply temperature delivered on the technologycooling side of the system, a sign that the industry is becoming more precise about the interface between the building and the server.

Liquid cooling data centre infrastucture.

The next risk is not only dirty air – it is a poorly controlled thermal ecosystem The environmental-risk conversation is broadening. Air-side management still requires controlling particulates, gases and humidity, while liquid cooling introduces complexities around coolant quality, material compatibility, leaks, and rapid thermal transients. Because the IT hardware cycle has compressed faster than liquid-cooling standardisation, designing to generic baselines puts risks on overall reliability, meaning commissioning and quality assurance are central to project delivery. As noted in the ASHRAE/PNNL/NEMA Framework, AI facilities are evolving while being built, straining linear project delivery. Commissioning feedback must reach design and operations faster, with performance validation continuing well beyond handover. What has changed in 2026? • June 2026 – a new AI Data Centre Energy Performance Framework. ASHRAE, PNNL and NEMA brought thermal management, electrical infrastructure, energy, water, grid interaction, resilience, commissioning and operations into one integrated best-practice framework. • Standard 90.4-2025 is now the current ASHRAE energy standard for data centres. It supersedes the 2022 edition and sets minimum energy-efficiency requirements for design, construction and planned operation and maintenance. • TC 9.9 guidance is becoming a living resource. The online Datacom Encyclopedia, launched from the longstanding Datacom Series, is designed to absorb updated material on thermal guidelines, facility design, liquid cooling, white papers and technical bulletins rather than relying only on periodic print editions. • Liquid cooling has moved from “emerging” to implementation. Recent TC 9.9 work focuses on cold plates, CDUs, resilience, fluid and materials compatibility, and the standardisation gaps that become critical at scale. • August 2026 – Water moved further up the agenda. ASHRAE Journal highlighted the data centre water-energy nexus and the need for a more explicit water-stewardship framework, reinforcing the shift away from judging performance through energy efficiency alone.

38 Building Services Engineering I September/October 2026

Water and energy can no longer be separated Across Europe, data centre cooling strategies are shifting to better manage water use. While warm-water liquid cooling can reduce reliance on evaporative systems, optimum designs depend on site climate, water availability and rack density. As a result, ASHRAE is expanding metrics beyond power usage effectiveness (PUE) to include water usage effectiveness (WUE), carbon and demand flexibility. The core focus has moved from simple room cooling to how effectively the entire system uses energy, water, and infrastructure while maintaining reliability. Ireland: where the stakes are highest in Europe Ireland hosts one of Europe’s largest data centre concentrations, accounting for roughly 21% of metered electricity demand in 2023. In Dublin, this density has created infrastructure pressures from two directions: grid constraints pushing development outward, and sustained regulatory and public scrutiny over regional water consumption. Consequently, the ASHRAE Framework’s integrated focus on energy, water, grid interaction and resilience reflects the realities Irish operators are already managing. For local engineers, integrating power and cooling design, optimising grid flexibility and tracking water alongside energy are becoming standard requirements. Shifting industry metrics from PUE toward a broader framework covering energy, water, carbon and demand flexibility aligns directly with what Irish regulators and planners increasingly demand. What should operators do now? For data-centre owners and operators, the practical implication is not to abandon the established controls but to widen their environmental risk registers, combining management – with new liquid-cooling disciplines like materials compatibility, leak management and continuous monitoring. Because design assumptions can age quickly, independent validation is increasingly critical. Air-treatment technologies and liquid-side specifications must be verified against actual equipment, fluids and operating conditions, rather than

accepted at face value. At the iAIR Institute and through ASHRAE Ireland, our interest in this field comes from that intersection of building systems, environmental science and independent performance verification. Today’s data centre is a complex thermal ecosystem. Maintaining long-term reliability depends on understanding the interactions between air, liquid loops, IT equipment, and operational strategy – and verifying that those interactions perform as intended under real operating conditions, not just at handover. The old rules still matter - but they are no longer the whole story Next-generation data centres will integrate both air and liquid cooling within the same facility. Traditional environmental threats like dust and humidity persist, while high-density AI hardware adds new cooling loops, failure modes, and power demands. According to ASHRAE, control strategies must shift from simple cooling to optimising tightly coupled power-andthermal systems. The goal for operators is to ensure legacy and new technologies function together efficiently, resiliently, and reliably under real-world conditions. For more information on data centre IAQ, environmental risk & ASHRAE advisory, please visit airmidhealthgroup.com or scan the QR code About the author Dr John McKeon is President of ASHRAE Ireland Chapter for 2026–27 and contributes to the chapter’s thought leadership on indoor environmental quality, healthy buildings and the relationship between the built environment and human health. A medical doctor by training, he is Principal of the iAIR Institute and Medical Director of Airmid Healthgroup, where his work focuses on indoor air, healthy buildings and interdisciplinary approaches to indoor environmental quality.

T E K

E E M

R U O TY

R A M

Building Services Engineering I September/October 2026 39

RDS, Dublin: 18-19 Nov 2026

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40 Building Services Engineering I September/October 2026

Euro Gas: A Record Summer of Heating Innovation

ow, what a summer it’s been! Here at Euro Gas, we have been flat out this summer, working on all kinds of projects. From schools to hospitals, social housing to pharmaceuticals, this has been one to remember. Ten years ago, an average summer pipeline of work consisted of boiler rooms and more boiler rooms. Thankfully, there are still plenty of those to go around, but now we sometimes find ourselves promoted from the basement to the roof as we supply more and more modular and single heat pumps. Whether you need LPHW or DHW, Euro Gas has a solution for all, and we’re helping design engineers and contractors meet their requirements. Here is a sample of this summer’s work, showcasing the following:

• Wall Hung Condensing Boilers • Electric Boilers • R290 Modular Heat Pumps • DHW Air Source Heat Pumps • Floor Standing Condensing Boilers • Vacuum Degassers • Combined Air and Dirt Hydraulic Separators • Large Pressure Jet Floor Standing Boilers To learn more about what Euro Gas can do for you, visit eurogas.ie or scan the QR code, email sales@eurogas.ie or phone 01 286 8244

Building Services Engineering I September/October 2026 41

Clean heat, no flame, no flue!: how Jäspi electric boilers support decarbonisation

eating is one of the largest sources of energy use and carbon emissions in buildings and industry. Electric boilers offer a straightforward path off fossil fuels: they convert electricity into heat at the point of use, produce no on-site combustion emissions, and become cleaner automatically as the electricity grid adds more renewables. Jäspi electric boilers are built for that role — as a main heat source, as backup for heat pumps, or as part of a hybrid system that can also support grid balancing. What an electric boiler does An electric boiler heats water with immersion elements (resistive heaters) rather than burning oil or gas. There is no flue, no fuel store and no combustion products at the building. Efficiency at the appliance is typically close to 100%: almost all of the electricity becomes useful heat. Practical advantages (and honest limits) Advantages • Compact installation, no chimney or fuel tank • Quiet operation and fewer moving parts than a burner • Staged power control so the boiler runs only the kW needed • Factory testing and remotecontrol options on FIL units • Easy hybridisation with heat pumps, buffer tanks and solar thermal

Why this matters for decarbonisation Electric boilers do not remove carbon from the electricity system by themselves. Their climate benefit depends on how the power is generated. The case for them is still strong for several reasons: 1. Zero emissions at the building. No on-site CO₂, NOx or SOx from the boiler. Indoor air quality and permitting are simpler than for combustion plant. 2. They track a greening grid. As wind, solar, hydro and other low-carbon generation grow, the same boiler’s carbon intensity falls without a hardware change. 3. They pair well with heat pumps. Heat pumps do most of the annual work; the electric boiler covers peaks, very cold weather and hot-water spikes. Jäspi FIL-LP models are designed for that role. 4. They can soak up surplus electricity. Larger FIL units, including SG models, can be used where the grid needs flexible demand (for example frequency containment). That turns heating into a tool for integrating renewables, not only a load.

5. High conversion efficiency. Avoiding flue losses means less energy purchased for the same heat delivered, compared with typical combustion boilers. Where Jäspi fits Euro Gas is the partner in Ireland for Jäspi FIL boilers and has used them as peak-load support in district heating schemes and data centres. If you are specifying heat for a commercial application, an electric boiler is no longer only a “last resort” when gas is unavailable, flue runs are impossible, or space is limited for a heat pump. It is a decarbonisation component: clean at the flue, efficient at the terminals, and increasingly useful to the grid.

42 Building Services Engineering I September/October 2026

FOCUS

Powering building services: The Construct Innovate blueprint for Irish building services engineers

onstruct Innovate is Ireland’s National Construction Technology and Innovation Centre, established to drive a swift, mainstream transition toward a sustainable, productive, and modern built environment. Hosted at the University of Galway, the centre brings together more than 125 active industry members as well as 13 Research Performing Organisation (RPO) members, including UCD, Trinity College Dublin, UCC, the IGBC, and its latest recruit, Dublin City University (DCU). The centre is funded through Enterprise Ireland’s Technology Centre programme. This ecosystem serves as a vital collaborative bridge, linking cuttingedge applied innovation directly with practical, on-site industry applications to advance modern construction. Driving innovation in building services To meet Ireland’s ambitious Climate Action Plan targets, Construct Innovate is actively driving targeted innovation, pilot projects and technology trials across key pillars of building services engineering. National building energy performance Data is at the heart of modern construction and allows good decisions both at sectoral and organisational level. In the space of energy performance of our national building stock, Dr Ciara Ahern, Senior Lecturer, Building Engineering in TU Dublin is a member of Construct Innovate’s management committee and also leads the “Irish Building Stock Observatory” (www. ibso.ie). The IBSO acts as a national data steward for Ireland’s building stock, democratising access to validated energy performance data for researchers, policymakers and industry. The IBSO tracks BER ratings, retrofit status, dwelling typology and heat-pump uptake, with the residential sector characterised through reference dwellings that

and contractors can leverage this field data and research output to optimise MEICA systems, successfully balancing extreme energy efficiency with excellent occupant well-being.

support bottom-up stock energy modelling. Using this historical data, IBSO forecasts whether Ireland is on track to meet its energy targets. This evidence base is central to IBSO’s core mission of narrowing the energy performance gap between designed and actual building performance. The IBSO is now working closely with SEAI to extend this characterisation to the commercial sector, building toward a fuller national picture of energy performance across residential, commercial and public building stocks. Management and expert analysis of the data associated with our national building stock allows for better decision-making at both national and company level, informing policy direction and helping companies understand the direction of travel in this area. Indoor air quality and ventilation With the rapid push toward highly airtight, low-energy building envelopes, maintaining healthy indoor environments is critical. Construct Innovate collaborates with academic partners, which include Dr Magdalena Hajdukiewicz and Dr Marie Coggins, in University of Galway to evaluate real-world ventilation performance and monitor post-occupancy Indoor Air Quality (IAQ) in deeply retrofitted residential and commercial buildings. Industry partners, designers

Sustainability and circular economy Underpinning the key drivers shaping modern approaches to building design and construction is a strict life-cycle approach to sustainability. Working alongside the Irish Green Building Council (IGBC), Dr Paul Moran and Prof Jamie Goggins of the University of Galway, as well as expert engineering consultancies, Construct Innovate has helped support the development of the national methodology for Whole Lifecycle Carbon (WLC) calculation. It is working to develop evaluation methodologies for calculating the embodied carbon of buildings and their M&E systems and promotes Environmental Product Declarations (EPDs). Construct Innovate is also hoping to commence trials on Digital Product Passport technologies with some of its industry partners to understand the deployment of this technology in an Irish context. Engineers interested in collaborating on these research fields or applying for project funding can review the Collaborate with RPOs Hub and the Construct Innovate Membership Benefits Guide. The ENACT Initiative: Commercial retrofit resources A standout, real-world example of Construct Innovate’s collaborative reach is through the SEAIfunded ENACT (Enabling National Action for Commercial Take-up of Retrofitting) project. A collaboration between the University of Galway, IGBC, Sustainability Works and the Society of Chartered Surveyors Ireland (SCSI), ENACT is a major initiative tasked with tackling the technical, financial, and behavioural barriers to energy renovation in

Building Services Engineering I September/October 2026 43

commercial buildings. For building services engineers, ENACT has compiled a highly practical suite of open-access project resources hosted on the ENACT Commercial Retrofit Portal (www.constructinnovate.ie/ enabling-commercial-retrofit) • Case Studies & Technical Analysis: A significant repository of real-world retrofit projects (such as logistics hubs and retail units) outlining pre- and postintervention data. These detail the exact performance impact of HVAC optimisations, heat pump integration, and solar PV installs. Download directly at the ENACT Commercial Retrofit Portal • The ENACT SME Advice Guide: A comprehensive manual written to demystify complex retrofit journeys, offering HVAC specifiers and business tenants clear pathways to optimize energy efficiency and comply with coming regulations. Download directly at the ENACT Commercial Retrofit Portal • Commercial Retrofit Finance Guide: An essential tool for building services engineers pitching projects to clients, providing clear outlines on energy audits, SBCI green loans and SEAI grant mechanisms. Download directly at the ENACT Commercial Retrofit Portal

Knowledge sharing: Weekly open-to-all webinars A vital way Construct Innovate bridges the gap between academic theory and practical application is through its popular weekly webinar series. Running every Tuesday from 12:00 to 13:00 (excluding summer), these sessions are entirely free and open to everyone in the industry. Organised in collaboration with Engineers Ireland West and supported by leading professional bodies including the RIAI, SCSI, ACEI and CIF, the webinars serve as a primary platform where the latest research outputs, pilot projects and industrial breakthroughs are presented to the wider sector. For building services engineers, these webinars are an invaluable resource to: • Discover live projects and learn about cutting-edge concepts in Modern Methods of Construction (MMC), how digital construction technologies are changing how we deliver projects and how sustainability considerations need to be planned into all projects from the concept stage. • Earn Continuous Professional Development (CPD): Keep up-todate with rapid regulatory changes and technical innovations while acquiring easy CPD credits. • Engage with industry peers: Hear directly from contractors,

designers, and researchers who are resolving the exact on-site challenges you face daily. With an archive of over 50 past sessions and regular live events, you can register for upcoming talks or browse the on-demand recording library directly at the Construct Innovate Webinars Hub. To learn more or get involved in the work of Construct Innovate, visit www. constructinnovate.ie

Summary of key resources mentioned • Irish Building Stock Observatory (IBSO): Validated energy performance data, BER tracking and stock modelling (ibso.ie). • ENACT Commercial Retrofit Portal: Open-access case studies, SME advice guides and finance guides for building services engineers (constructinnovate.ie/enablingcommercial-retrofit). • Weekly Open-to-All Webinars: Free Tuesday sessions (12:00–13:00) offering CPD credits, live project insights and industry networking (constructionnovate.ie).

44 Building Services Engineering I September/October 2026

A Complete One-Stop Solution

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46 Building Services Engineering I September/October 2026

FOCUS

Form, function and flow: An expert guide to radiator selection in Irish homes FRANK DONOHOE, Donohoe Heating Services, looks at the range of radiator choices open to specifiers and suggests options for balancing aesthetics and performance in various client scenarios.

n recent years, the landscape of domestic heating specification across Ireland has undergone a fundamental shift. Where radiator selection was once treated as a late-stage mechanical detail, today’s architectural trends, energy performance mandates and interior design expectations demand a far more integrated approach. Reviewing recent domestic projects I have been involved in – spanning contemporary new builds to detailed period restorations – reveals a consistent tension in client briefs: the balance between ‘budget’ and ‘style’. For specifiers, mechanical engineers and interior designers working alongside homebuilders or private clients, navigating this divide requires an understanding of both thermal efficiency and spatial aesthetics. The budget versus style divide In projects where tight financial parameters dictate design decisions, the standard compact panel radiator remains the pragmatic workhorse of the industry. Offering high thermal output per euro spent, factory-fitted side panels, and top grilles, compacts deliver a clean, functional solution to basic spaceheating requirements. They fulfil their primary duty reliably, but few design professionals or homeowners would argue they represent the ideal visual solution. As homeowner expectations have elevated and interior spaces have become more refined, major European

The home compact.

and domestic manufacturers have responded with an expansive range of design-led emitters. These options move beyond pure utility, allowing specifiers to treat heating elements as architectural features rather than visual compromises. Subtle integration: Modern horizontal profiles When the design brief calls for minimalist, progressive interiors, horizontal emitters that sit discreetly within the architectural scheme are often preferred. Products such as the Zehnder Nova Horizontal exemplify this approach. With its crisp, flat-tube profile and clean horizontal lines, the Nova offers a sleek, linear appearance

SELECTION MATRIX Radiator Type Compact Panel Horizontal Linear Vertical Emitter Steel Multi-Column

that integrates effortlessly into contemporary room geometry. Rather than drawing the eye as a prominent fixture, these modern horizontal profiles can be specified to align with window sills, dado lines, or custom joinery. The result is a subtle, streamlined aesthetic that complements open-plan living areas while delivering consistent radiant and convected heat. Maximising wall real estate: The case for vertical emitters One of the most notable shifts in modern domestic layouts – particularly in extended or reconfigured Irish homes – is the loss of traditional wall space. Large sliding glass doors, fullheight glazed extensions, integrated kitchen cabinetry and open floor plans frequently leave very little horizontal wall space for conventional heating emitters. In these environments, vertical radiators – available in both flat-panel and column formats – have become an essential specification choice. The Merriott S35 and S70 series

Building Services Engineering I September/October 2026 47

represent typical workhorses in this category. Offering versatile dimensional configurations and multiple connection possibilities, vertical units allow designers to tap into unused vertical wall space alongside door frames or within narrow alcoves. Beyond space optimisation, vertical emitters deliver strong visual impact. They create clean, vertical sightlines that accentuate ceiling height, turning a potential spatial constraint into an intentional design feature. Heritage and period renovations: Cast iron vs. steel multi-column Restoration and retrofitting projects in Ireland’s older housing stock – from Victorian and Edwardian townhouses to Georgian farmhouses – present a distinct set of challenges. Preserving the historical character of these properties usually demands a traditional cast iron or multi-column aesthetic. While authentic cast-iron radiators remain popular for heritage purists, modern steel multi-column radiators are rapidly gaining market share in period renovations. The reasons are largely practical: • Structural weight: Steel multicolumn radiators offer a significantly lower dry weight than traditional cast iron. This reduces structural floor loads – a critical advantage when installing emitters on suspended timber floors on upper storeys. • Dimensional and finish variety: Modern steel multi-column ranges offer exceptional flexibility in depth, height, and section counts. Crucially, they are available in a vast spectrum of factory-applied RAL colours and metallic finishes, enabling designers to match heritage paint palettes precisely or create striking contrast features. Navigating low-temperature systems and heat pump integration Any discussion on modern radiator specification in Ireland must account for the rapid transition toward lowtemperature heat sources. Under Part L of the Irish Building Regulations and the ongoing expansion of Sustainable Energy Authority of Ireland (SEAI) home energy upgrades, heat pumps have become the standard heat source for new builds and deep retrofits. Operating at lower flow temperatures (typically 55/50C – ΔT 32 °C (c/f

The Merriott S35.

0.55), or 45/40°C - ΔT 22 °C (c/f 0.34) compared to 75°C for traditional oil or gas boilers), heat pumps require larger emitter surface areas to satisfy heat loss requirements. Specifiers must ensure that design-led radiators – whether linear, vertical or column styles– are correctly sized using the lower Mean Water Temperature (DT 30 K) output figures rather than traditional high-temperature ratings (DT 50 K). Fortunately, the modular nature of vertical and multi-column steel radiators makes them well-suited for scaling up surface area without sacrificing aesthetic proportion. Final thoughts Radiator specification should never be viewed as a choice between engineering performance and visual elegance. By engaging early in the design phase, specifiers, interior designers and heating contractors can balance thermal requirements within spatial constraints. Whether selecting costThe multi-column corner unit.

The Zehnder Nova.

effective compacts for secondary rooms or specifying custom-finished vertical and multi-column emitters for principal spaces, matching the right emitter style to the property’s character ensures a warm, stylish, and energy-efficient home. About the Author Frank Donohoe, Principal of Dublinbased Donohoe Heating Services, has over 40 years’ experience operating in the specification sector and specialises in premium heating solutions. He oversees bespoke installations for prestigious civic projects and contemporary residential properties. To learn more, visit dhsheating.ie

48 Building Services Engineering I September/October 2026

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Fireplaces as design products Design and technology are central to the concept of Metalfire fireplaces with the emphasis on pure details, simplicity of materials and sleek styling. The result is a product range of over 100 appliances that fit perfectly in every interior, every wall and every piece of furniture. The versatile custom options, surrounds and extensions mean that they also complement the design of the interior as a whole. Closed and bespoke gas fires Metalfire gas-fired fireplaces are outstandingly userfriendly. They provide a warm and cosy fireside in an instant. In addition, they are extremely easy to maintain.

HDL Est. Est.1970 1970

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50 Building Services Engineering I September/October 2026

FOCUS

Reaching new heights: Decarbonising buildings through vertical lift extensions

uilding upwards rather than demolishing is a powerful decarbonisation strategy. For building services engineers collaborating with architects, Irish Lift & Escalator Association (ILEA) members offer specialised expertise in expanding vertical transport during structural extensions while keeping buildings fully occupied. The carbon reduction imperative To address environmental sustainability and high-density performance, the vertical transportation industry is transforming how lift equipment is manufactured, installed and operated. For example, reducing embodied carbon is achieved by extending the lifespan of structural shaft components and adopting low-impact materials, while operational carbon drops significantly through gearless traction machines, regenerative drives that return unused kinetic energy to the building power grid and energy-saving sleep modes. At the same time, advances in microprocessors and cloud connectivity have modernised lift controls. Destination dispatch systems now streamline traffic management to reduce unnecessary trips and power draw, while integrated security features seamlessly regulate access across different floors. Modern elevator systems incorporate real-time predictive monitoring and multilayered safety mechanisms, providing facility managers and building owners with an optimal blend of energy Lift extension at the Beacon Hospital Sandyford, Dublin, by Orona Midwestern Lifts.

efficiency, operational reliability, user safety and longterm durability. Many modern upgrades can be retrofitted without full system replacement, particularly during vertical building extensions. ILEA members have extensive experience working with clients looking to maintain existing shafts and equipment, reducing project costs and embodied and operational carbon emissions. Vertical expansion Demolition carries a severe environmental penalty, extended timelines, tenant displacement and significant revenue loss. Retaining existing lift shafts and increasing a building’s height by adding floors drastically shrinks this carbon footprint. The vertical transport industry has evolved to deliver superior energy efficiency, advanced controls and enhanced reliability, making vertical extensions a highly sustainable choice for residential and medium-sized commercial properties. Upgrades can also be phased over time depending on equipment age and capital planning. Minimising disruption in healthcare and commercial spaces A major advantage of vertical expansion is that structural additions and shaft extensions can occur while the building remains fully operational. This methodology is tried and tested across retail, commercial and healthcare sectors. Recent Irish benchmarks include the three-storey

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available to occupants at all times. When planning these expansions, ILEA strongly recommends fully replacing legacy hydraulic installations with more energy-efficient systems rather than modifying them to handle increased travel heights. ILEA member companies possess extensive, hands-on experience navigating these complex retrofits. Building services engineers and architects are encouraged to engage early with ILEA specialists to assess existing infrastructure, plan phased integrations and determine the optimal engineering path forward.

EU Machinery Regulation 2023/1230 and vertical transportation Lift extension at University Hospital Limerick by Orona Midwestern Lifts.

lift extension at University Hospital Limerick (UHL) and a comparable project at Blackrock Clinic in Dublin. During construction, existing lifts can be maintained in service while new upper floors and extended shafts are built around them. Execution and technical recommendations Once structural work progresses, individual lifts can be decommissioned sequentially for modernisation or replacement, ensuring a baseline lift service remains

Regulations and standards governing vertical transportation in Ireland

While vertical transportation installations are primarily covered by Irish Building Regulations (including accessibility mandates under Part M and its accompanying Technical Guidance Documents), ILEA members operate under a broader framework of national, European and occupational health and safety regulations: • Electrical Installations: National rules for electrical installations, published by the National Standards Authority of Ireland (NSAI), govern lift wiring and supply safety through IS 10101:2020 and its AC2:2025 amendments. • European Directives & Transpositions: The European Lifts Directive 2014/33/EU governs core manufacturing and placement guidelines and is legally transposed into Irish law via SI No. 232/2017 (European Union (Lifts and Safety Components for Lifts) Regulations 2017). (See panel other for details on EU Machinery Regulation (EU) 2023/1230) • Design Standards: The EN 81-20 and EN 81-50 series are the primary harmonised engineering standards for vertical transportation design, testing, and installation safety. • Health and Safety at Work: Beyond installation, the Health and Safety Authority (HSA) enforces strict workplace operation rules under SI No 299/2007 (Safety, Health and Welfare at Work (General Application) Regulations 2007). Specifically, Regulation 52 requires all operational passenger and goods lifts to undergo a statutory thorough examination by a competent person every six months to maintain a valid register of lifting equipment.

ILEA advises building services engineers to prepare for the EU Machinery Regulation (EU) 2023/1230, which becomes fully binding across all EU member states on 20 January 2027. Replacing the legacy Machinery Directive 2006/42/ EC, this regulation applies directly without requiring national transposition, aligning safety rules with Industry 4.0. Notably, where substantial modifications are carried out to passenger and goods passenger lifts, components must be CE tested and stamped. This will require re-certification by the lift installer and contractor, with the CE numbers added to the lift and copies of tests supplied to the building owner to update the building file of works completed. For the vertical transportation sector, the regulation introduces critical updates: Escalators, moving walks and platform lifts Governed directly by the regulation, these systems face three major compliance shifts: • Cybersecurity: Control systems connected to building management systems (BMS) or remote diagnostics must feature built-in protection against cyber attacks to protect critical safety functions. • Substantial modification: Major modernisations changing an existing asset’s speed, load capacity or safety profile require full re-certification under 2027 rules. • Digital manuals: O&M instructions may now be provided digitally (eg, via QR codes), though a paper copy must remain available upon request. Standard passenger lifts While passenger lifts remain under the Lifts Directive 2014/33/ EU, that directive borrows over 50% of its safety rules from machinery law. On 20 January 2027, the Lifts Directive will officially bridge to the new regulation. Consequently, connected lift systems utilising cloud diagnostics or AI-driven dispatch must meet new machinery rules regarding protection against digital corruption. Harmonised standards, including the EN 81 series, are being systematically updated to align with these criteria. Action required Before the deadline, ILEA advises that engineers, installers and component suppliers must overhaul technical files, risk assessments and Declarations of Conformity (DoC) to ensure both mechanical and digital resilience compliance.

52 Building 2026 Building Services Services Engineering Engineering II July/August September/October 2026

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54 Building Services Engineering I September/October 2026

CIBSE IRELAND

Driving Connections: How CIBSE YEN Ireland is shaping the future of building services

n an industry defined by rapid technological innovation, decarbonisation goals and evolving regulatory standards, the value of robust professional networks cannot be overstated. For young engineers entering the Irish building services sector, navigating career pathways while staying ahead of technical developments can feel like a formidable task. Stepping into this gap is the CIBSE Young Engineers Network (YEN) Ireland, a CIBSE Ireland group dedicated to fostering growth, collaboration and community among the next generation of building services professionals. Dylan Ryan leads YEN Ireland, bringing nearly a decade of broad engineering experience to his role as Chair. Currently working as a technical and specification sales representative at Euro Gas, Dylan is channelling his passion for collaboration into expanding the network’s reach across Ireland.

A diverse path into building services Dylan’s route into the HVAC and building services sector reflects the dynamic nature of modern engineering careers. Having graduated with a degree in electrical engineering from the University of Galway in 2016, his early career took him across multiple disciplines and continents. From manufacturing and process engineering in Ireland, Dylan moved to New Zealand to work in substation design, followed by a stint in food processing engineering in Australia. Upon returning home, he broadened his commercial acumen by completing a Master’s in Business Administration (MBA) at the University of Limerick, graduating in 2024. For the past three years, he has been an integral part of the HVAC industry with Euro Gas. CIBSE Ireland YEN tour of The Glass Bottle site, Dublin, which was hosted by Adam Dent of Kerrigan Mechanical. Adam was the first CIBSE Ireland YEN Chair.

It was during his time at Euro Gas that he first engaged with CIBSE. Dylan comments: “My colleague James Porter, who is CIBSE Ireland Honorary Treasurer and sits on its committee, introduced me to the YEN. Ryan Loney, who had served as the YEN Ireland Chair previously, kindly put me forward to take over the role.” Taking on the chair gave Dylan a platform to advocate for young professionals and highlight the vast opportunities available within building services engineering. He was joined on the YEN committee by Emma Hinch (Vice Chair), Sean McMahon (Treasurer) and Niall Gibbons (Secretary), who stayed on from the previous committee. Unlocking insights and practical value For new graduates and early-career engineers, joining YEN Ireland provides both immediate career support and longterm professional development. The network acts as a bridge between foundational education and the practical realities of industry practice. Dylan explains: “There are numerous benefits to joining CIBSE YEN. It offers a fantastic opportunity to expand your professional network and connect with individuals from all areas of the building services industry. Membership also gives you a deeper understanding of how CIBSE develops its regulations and standards. Through that connection, you gain valuable access to insights and knowledge that directly inform your daily work.” This spirit of interdisciplinary connection mirrors Dylan’s own practical experiences in the field. When reflecting on his proudest professional moments, he points to the

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rewarding nature of collaborative design. “Rather than a single project, I lean into my experiences working alongside consultant engineers and installers to develop effective design solutions for existing plants and new facilities through Euro Gas,” he says. “When a project is completed, you get to reflect and say, ‘I, alongside the design consultancies and installers, have been able to make a significant impact on this project as a whole’. Being able to see your ideas and contributions manifest into something real is a great feeling.” Fostering relationships and student outreach Over the past year, YEN Ireland has made significant strides in strengthening its presence across the country. The network has expanded its event calendar – balancing rigorous technical seminars with informal social gatherings – while refining its committee structures and implementing data-driven methods to evaluate event feedback and continuous improvement. Looking ahead, Dylan’s overarching vision for YEN Ireland centres on one fundamental core principle: “building relationships”. “My main focus as Chair has been to build on the momentum of previous years and establish new anchor events that strengthen relationships across the network,” he states. “My overarching theme is relationships— initiating, enhancing and growing connections on all sides of YEN.” To achieve this, YEN Ireland has set out several key strategic priorities: • Industry alignment: Strengthening ties between active YEN professionals, the main CIBSE committee and industry sponsors. • Student engagement: Connecting college and university students entering the building services field with working professionals early in their educational journey. • National collaboration: Encouraging greater crossdisciplinary collaboration throughout all facets of CIBSE in Ireland. • Mentorship programmes: Developing structured mentorship opportunities that link experienced CIBSE and YEN alumni with newer members. • Inclusive events: Hosting accessible, enjoyable and inclusive gatherings that encourage open knowledge sharing. By engaging students before they graduate, through CIBSE Ireland, CIBSE YEN Ireland aims to ease the transition from academia to industry, giving newcomers access to mentors, peers and potential employers. Bringing Buildings Alive podcast Dylan highlights these career challenges in a recent episode of the CIBSE Ireland Bringing Buildings Alive podcast, interviewing Max McCone, Mott MacDonald engineer and former CIBSE YEN Global Chair. Together, they explore the transition from university to full-time work, strategies to simplify chartership, and why soft skills often outweigh technical expertise. “Chatting with Max really highlighted how pivotal the YEN network is,” says Dylan. “Transitioning from theory

Dylan Ryan, Chair, CIBSE YEN Ireland.

to real-world practice can feel daunting, but having a strong professional community behind you accelerates your growth and makes navigating chartership far less overwhelming.” Join a growing movement of young engineers Dylan Ryan points out that YEN Ireland’s strength lies entirely in the collective effort of its members and committee. “If I were to ‘pay it forward,’ I couldn’t single out one mentor or role model,” Dylan notes. “Instead, I would pay it forward to my committee. They work tirelessly behind the scenes, often without recognition, and their dedication is what makes YEN successful. It’s vital to me that they get the credit they deserve.” For young engineers, graduates, and students considering their next professional step, CIBSE YEN Ireland offers a welcoming platform to build confidence, expand industry knowledge, and establish long-lasting career contacts. Whether you are looking to understand emerging technical standards, seek mentorship, or simply meet peers across design, sales, contracting, and consulting, YEN Ireland provides the community to help you succeed. To get involved with CIBSE YEN Ireland, attend upcoming technical or social events, or learn more about mentorship opportunities, visit the CIBSE Ireland portal at cibse.org/get-involved/regions/ireland/ or connect with the CIBSE YEN committee on LinkedIn at linkedin.com/company/cibseyenireland or email cibseyenirl@gmail.com The Bring Buildings Alive podcasts can be found at cibse.org/get-involved/regions/ireland/bring-buildingsalive-podcast

56 Building Services Engineering I September/October 2026

CAREERS IN ENGINEERING – A STUDENT’S PERSPECTIVE

Sean Connolly, Sustainable Energy Engineering Student, Munster Technological University Munster Technological University Sustainable Energy Engineering student SEAN CONNOLLY shares key takeaways from his recent work placement, how college is preparing him for real-world engineering and reflects on how AI tools and data skills bridge the gap between classroom theory and practical HVAC design. What degree are you taking, which college are you currently attending, and where did you recently complete your internship? I am currently pursuing a degree in Sustainable Energy Engineering at Munster Technological University in Co Cork. I have recently completed my internship at Lawler Sustainability’s Kilkenny office. What drew you to engineering– and any specific areas of interest – and what inspired you to pursue this field of study? I have always been interested in understanding how things work. From a young age, I was the type of person who wanted to know not just how something worked, but why it worked the way it did. That curiosity naturally led me towards engineering and wanting to understand how different systems fit together. I’ve spent a lot of my summers working in construction, which gave me an early insight into the practical side of the industry. I also had the opportunity to work alongside my brother, who is an electrician. Being exposed to that environment made me realise how many different systems and trades are involved in making a building function properly. As I progressed through school and began looking at engineering as a career, I became particularly interested in how these individual systems could be brought together on a much larger scale. This is what drew me towards building services. I found the variety particularly interesting, as the systems within a building can be designed and adjusted depending on the building, its use and the people occupying it. I like the fact that building services is not simply about applying the same solution every time. There is a need to understand the building and consider how systems can be adapted to different scenarios while still being efficient and effective. That combination of technical knowledge,

Sustainable Energy Engineering student Sean Connolly.

problem-solving and practical application is what made me want to pursue engineering and, more specifically, building services. How did your internship align with your initial perceptions of the building services industry, and what was the most valuable or surprising takeaway from your time on the job? My internship gave me a much better understanding of what working in building services actually involves. Before starting, I was interested in the technical side of building services and how different systems operate within a building. However, I probably underestimated how much analysis, problem-solving and decision-making goes on behind the scenes. During my internship, I was involved in energy auditing, analysing building energy data, developing baselines and looking at opportunities to improve the performance of existing buildings. This allowed me to look at building services systems, such as heating, ventilation, pumps, lighting, boilers, CHP and controls, and understand how they operate in real buildings rather than just learning about them in a classroom. One of the things that stood out to me was that you cannot look at each system in isolation. A change to one system can have an impact on another, so you need to understand how the different building services interact and how the building is actually being used. I found this particularly interesting because it showed me how building services can be adapted depending on the type of building, its occupancy and how it operates. The most valuable takeaway for me was probably seeing

Building Services Engineering I September/October 2026 57

how important data is to engineering decisions. I learned that it is not enough to identify that a system could be more efficient; you need to understand how it is currently performing, analyse the data and then determine whether a proposed solution will actually deliver an improvement. I was also surprised by how much technology and automation are becoming part of building services. During my placement, I developed tools to automate parts of the analysis process, which showed me how increasingly digital engineering is becoming. Overall, the internship confirmed that building services is an area I would like to work in. It showed me that the industry is much broader than I initially realised, combining mechanical and electrical systems with data analysis, sustainability, technology and practical problemsolving. Munster Technologiical University.

Looking at what you are learning in college, do you feel your coursework is effectively setting you up for the practical demands of entering the workforce? My degree provided a strong foundation in core subjects – thermodynamics, heat transfer, fluid mechanics, and electrical systems – while teaching me how to think like an engineer. However, my internship highlighted the difference between academia and real-world application. College presents defined problems with clear data, whereas industry requires navigating incomplete information, existing building systems, and operational issues. Working with real projects and energy data helped bridge this gap. I also realised that collaboration and clear communication are far more important in the workplace than I expected. Overall, my course prepared me well, but while a degree builds the foundation, practical experience teaches you how to apply it effectively. How is AI featured or utilised in your course, and what role do you see AI playing in your day-to-day work as a future engineer? When it comes to AI, there is a noticeable gap between college and industry. While universities often prohibit AI to protect fundamental learning, industry widely uses it to streamline workload management, summaries and repetitive tasks – enhancing efficiency rather than replacing engineering judgment. During my time in the industy, I saw AI being used as a tool to support engineers with everyday tasks. It can help with things such as organising and managing workloads, setting reminders, summarising information, completing simple repetitive tasks and helping you work more efficiently. It is not necessarily meant to replace engineering knowledge or decision-making, but rather to make day-to-day work more efficient. There is a strong argument for introducing AI into education in a controlled way. Students must build core

58 Building Services Engineering I September/October 2026 engineering principles while also gaining confidence with tools they will encounter professionally. Much like Excel, AI will become a standard engineering tool. The key is learning when to use it and how to validate its output, ensuring a far smoother transition into industry. What digital skills are you learning in college, and how are you applying these? Throughout my degree and internship, I have been developing digital skills that will be valuable in engineering. Excel has been my primary tool for analysing data, performing calculations and presenting results. After learning the basics of VBA in college, I built on that foundation during my internship to create custom tools and automate processes. I also gained experience using Python to process and analyse real building and energy data. These skills make engineering far more efficient. Automating repetitive tasks and visualising data quickly saves valuable time, allowing engineers to focus on core problem-solving and decision-making. Sustainability is central to modern building services. Which specific areas – such as net-zero carbon design, renewable integration, or circular engineering – are of most interest to you? Sustainability is one of the areas of building services that interests me most because of the direct impact engineers can have on building energy performance. While my degree covered energy efficiency and carbon reduction, my internship showed me how these principles apply in real-world settings. I am particularly interested in improving existing buildings. Adjusting systems like heating, ventilation, pumps, lighting, and controls can dramatically lower energy consumption without needing an entirely new building. I am also keen on integrating renewables, such as solar PV, so that different systems work together as efficiently as possible. Engineers play a major role in achieving net-zero targets. Sustainability is about finding practical, economically viable solutions that reduce emissions while keeping buildings comfortable and functional. Since every building is unique, I enjoy the problem-solving required and want to continue finding these tailored solutions throughout my career. Looking ahead to graduation, what types of projects or work environments excite you most, and where would you ideally like to launch your full-time career? Looking ahead to graduation, I would like to begin my career as an HVAC design engineer and work on technical problem-solving for building services. I am particularly interested in designing heating, ventilation and cooling systems tailored to different building uses. An area that excites me is energy efficiency, particularly heat recovery, heat pumps, renewables and smart building controls. Recovering heat from exhaust air to warm fresh air is a great example of reducing waste, and I want to deepen my understanding of integrating these technologies into effective designs. Ultimately, I aim to learn from experienced engineers, gain exposure to diverse projects and gradually take on more responsibility. My goal is to build a strong technical

foundation and become a confident design engineer delivering efficient, sustainable building services. What piece of advice would you give to another student preparing to take on their first engineering placement or internship? My biggest advice is to be as active and involved as possible during your placement rather than sitting back and waiting for tasks. Try and get to attend meetings to observe how engineers approach problems and make decisions. Make an effort to speak with experienced engineers, as they offer practical knowledge you cannot learn from textbooks. Most importantly, don’t be afraid to ask questions. Nobody expects a student to know everything, and asking questions helps you understand work and can expose you to new areas of engineering. Finally, put yourself forward for opportunities, even if you feel not ready. A placement is a chance to learn, make mistakes and build confidence: the more you put into the experience, the more you will get out of it.

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FOCUS

Commercial heat pumps: Selection, application and system design In part three of our series on heat pumps, ENDA RUXTON, Managing Director, Greentherm, examines the key selection, application and hydraulic considerations required to ensure efficient and reliable commercial operation.

n previous articles, we looked at compressor and refrigerant varieties and their pros and cons. In part three of this series on heat pumps, we take a closer look at the specifics of selection, applications and project considerations. The main requirements for heat pumps to perform reliably in an installation are normally covered by four key requirements. 1. Maximum and minimum flow rates are adhered to prevent alarms from occurring. This is eliminated if a circulating pump is correctly selected and hydraulic separation is included in the primary circuit. The addition of commissioning valves can sometimes form part of the solution. 2. The system is free from dirt, which can potentially cause flow rate and air movement issues. Magnetic filters and air separation equipment are an integral part of solving this issue. 3. Intentional or accidental flow restrictions caused by selected components such as specified valves, or thirdparty issues such as pipework restrictions or unspecified valves that may have a factory-designed flow restriction, ie, paddle-style zone valves instead of full-bore ball valves. 4. Electrical power quality is also all important. Modern heat pumps generally have extensive onboard electronics. The electrical network has a voltage deviation of +/-10% as outlined by the network providers. Some heat pumps can tolerate as little as +/-5%. Modern grid demands, however, have seen these tolerances being breached. Poor power quality can cause consistent and repeated alarms. Heat pump selection One of the key questions to consider when approaching selection is if a heat pump is for a domestic hot water (DHW) or low-pressure hot water (LPHW) heating/cooling application, or is both are to be potentially served by the same heat pumps. There is a common perception among designers that different heat pumps are required for each application. Where this may have been the case in the past, new refrigerants, such as R290 Propane, can easily satisfy both applications within the same project. Using common heat pumps for DHW and LPHW generally results in better value for money for the client, not just in terms of plant expenditure and labour savings, but also operational training and lifetime maintenance costs. The incorporation of low-temperature heat emitters into the design is critical to the efficient operation of heat pumps,

Enda Ruxton, Managing Director, Greentherm.

given the relationship between low flow temperatures and heat pump Coefficient of Performance (COP). Underfloor heating Underfloor heating in modern well-insulated commercial buildings can typically operate as low as 35 degrees C. Historically, underfloor heating was frequently installed in thick screeds around 100 to 150mm, which was wholly unsuited to Irish climatic conditions of wide temperature changes in short time periods. Thin liquid screeds of 50mm and some lowbuild systems can use screeds of about 10mm thickness, given response times similar to radiator-based systems. Radiators The challenge with using heat pumps with radiators has been low temperature sizing often results in very large radiators, increasing cost and, in some cases, being too big to fit in the allocated space. Frequently, radiators are designed to operate at circa 45 degrees, demanding a heat pump flow temperature of, perhaps, 60 degrees, when accounting for distribution losses. When compared with an underfloor system operating at 35 degrees and perhaps a heat pump flow temperature of 45 degrees, this can result in an operating cost that is at least 25% higher.

60 Building Services Engineering I September/October 2026 Antifreeze protection Commercial heat pump installations pose a particular challenge in terms of antifreeze protection. Until recently, there were only two methods of freeze protection used in commercial installations. Addition of an antifreeze fluid The first is the addition of an antifreeze fluid, such as propylene glycol, to the LPHW circuit at a suitable concentration, protecting against freezing. The benefit being that it works effectively without the need for any electrical controls and is not disabled through an electrical outage. But there are several potentially negative aspects to this solution: • Glycol reduces the overall system efficiency, typically 5-10% at a minimum. The glycol volume could be reduced through the addition of a PHEX, but this also introduces an efficiency loss due to primary to secondary thermal transfer • Every component used in a system will have a varying glycol tolerance. This could be in a range of 20-50% However, some components may be glycol intolerant, resulting in future component failure • The addition of glycol requires the use of a refractometer and the skill to use it correctly to ensure that the correct dilution level is achieved to produce the correct level of freeze protection • Commercial installations typically have automatic pressurisation units. As systems lose water and are repressurised, the glycol concentration is further diluted. This requires ongoing testing and maintenance. Electrical trace heating The second method is to use electrical trace heating on the outdoor installation pipework. This eliminates the need

for glycol, saving on thermal conduction efficiency, but introducing additional electrical power consumption. Antifreeze valves A third option, more recently available, is the use of antifreeze valves. These are installed on the heat pump flow and return pipework and contain a thermal cartridge, which triggers the valve to open at around 2C water temperature and close at just above 4C water temperature. These valves have an inbuilt anti-vacuum valve to allow reliable drainage, and some manufacturers include a removable thermostatic cartridge to facilitate system pressure testing during colder months. Hot water generation It is critical that designers look at the maximum flow temperatures that a respective heat pump can achieve under the ambient design limit, such as -3C. The distance to the calorifiers and the pipework installation also have a significant bearing on the system performance in terms of thermal losses. Standard steel pipe installations that are manually insulated can often have high distribution losses. It is not unusual that 10-15C is lost between generation and the load. In order to achieve hot water sterilisation at circa 60-65C, without the use of immersion heaters, it is recommended to look at using preinsulated piping systems used in district heating deployments. It is worth noting that the use of a secondary return circuit causes a continuous depletion of heat from DHW storage in a commercial design. The net effect can frequently be that heat pumps serving the calorifiers are subjected to short cycling of the compressor(s), which significantly shortens their lifespan. Where high delta T refrigerants such as CO2 are in use, this can create some complications in the hydraulic design that need to be carefully appraised. When designing DHW systems using indirect calorifiers, it is important to pay attention to the coil pressure drop, which can cause flow fault issues in heat pumps. Fresh water station cascade The coil surface area Image courtesy BRV Srl causes an issue regarding thermal transmission, with even the largest coils precluding the use of heat pumps with low delta T’s, above around 50kw. Tank in tank systems and thermal stores Tank-in-tank systems can offer a better solution as heat pumps are directly connected to the other buffer without the need for a heat exchanger. Thermal stores with instantaneous domestic hot water coils can provide a buffer ‘style’ solution capable of high heat pump flow rates, but they often underperform when paired with heat pumps with lower operating temperatures, as they can be subject

Building Services Engineering I September/October 2026 61

to an exponential decrease in performance as the LPHW temperature drops. While they produce instantaneous hot wwater in commercial projects, thermal stores also need to operate at a high enough temperature to ensure sterilisation of the distribution hot water pipework and the secondary return circuit.

Magnetic filter with air/dirt separation. Image courtesy RBM SpA

Fresh water stations The fourth potential method to produce DHW with heat pumps is to pair buffer tanks with fresh water stations. These are pre-packaged r plate heat exchanger (PHEX) with controllers that produce instantaneous hot water in a similar fashion to thermal storage tanks. Once again, the buffer caters for high unrestricted flow rates, but these experience the same issues as thermal stores around sterilisation temperatures when using secondary returns. Buffer tanks The use of buffer tanks in the system design addresses the following issues: • Provides water for the heat pump defrost cycle • Acts as additional thermal output in periods of higher demand and lower heat pump output, eg, colder winter time conditions • Provides hydraulic separation to allow the heat pump to stay within its maximum/ minimum flow rates, preventing alarms. As a general guidance, buffer storage is frequently sized at 10 litres per Kilowatt; however, primary pipework can provide part of the system volume required for defrost, but it is important to account for system zone valves that can isolate badly needed LPHW water. It is also possible to defrost from DHW storage, but this needs to be factored into the diversity calculations.

Cross-section of a tank-in-tank (inner tank DHW). - Image courtesy Lapesa

In conclusion Successfully deploying commercial heat pumps hinges on maintaining strict flow rates, clean systems and stable power to prevent system alarms. Modern refrigerants like R290 can allow a single heat pump layout to handle both space heating and domestic hot water efficiently, especially when paired with lowtemperature emitters

such as thin-screed underfloor heating. Designers must balance freeze protection options – weighing glycol’s efficiency penalties against trace heating or mechanical valves – while mitigating distribution heat losses and compressor short-cycling during hot water generation. Incorporating properly sized buffer tanks ultimately provides the hydraulic separation and defrost capacity necessary for reliable, long-term operation. About the Author Enda Ruxton, Founder and Managing Director, Greentherm, is a sustainable heating expert. specialising in renewable technologies like heat pumps and solar. He leads the design and commissioning of mechanical systems for diverse projects, utilising intelligent controls and energy monitoring. He combines mechanical engineering and controls expertise to deliver efficient, eco-friendly energy solutions across Ireland. Greentherm provide CPD training on a range of technical topics. For more details, phone 01 531 4781, email info@ greentherm.ie, visit www.greentherm.ie

62 Building Services Engineering I September/October 2026

Europe’s data centre boom needs more than power As Europe’s AI-driven expansion fuels an unprecedented data centre boom, securing electricity is only part of the challenge. MIHAI BARCANESCU, Policy Manager, EFCA, explains why building a resilient digital future demands a holistic engineering approach focused on water sustainability, physical security and cross-system integration.

he EU economy and society have been digitalising rapidly since the start of the 21st century, but the advent of AI and related developments has accelerated this transformation to unforeseen levels in just a couple of years. Yet behind these technological advances lies a less visible reality: the growing dependence of ICT services on physical infrastructure in general, with data centres being a key point of focus. As Europe pursues its ambitions in AI, digital competitiveness and technological sovereignty, the resilience of these facilities is becoming a strategic concern. In a very short space of time, data centres have evolved far beyond their traditional role as information repositories. They now support critical services ranging from healthcare and financial systems to transport networks, industrial operations and public administration. Their uninterrupted operation is

increasingly essential to economic activity and societal functioning. Thus, the discussion on digital infrastructure cannot solely focus on computing capacity. Resilience, sustainability and resource efficiency must be acknowledged as equally important priorities. This challenge is particularly relevant as Europe experiences unprecedented growth in demand for data processing and storage. Consequently, new facilities are being planned across the continent to support this demand. But while public attention has largely focused on their electricity consumption, the engineering challenges extend well beyond energy supply. The infrastructure behind Europe’s digital future Modern data centres are some of the most complex facilities being designed and operated today. They require sophisticated integration of electrical systems,

cooling and ventilation, backup power, cybersecurity measures, and advanced monitoring and control systems. Their performance depends on the seamless interaction of multiple technologies and procedures, as well as having the ability to anticipate and manage risks throughout the asset lifecycle. Furthermore, water is increasingly becoming part of this conversation. Although cooling technologies continue to improve, data centres depend directly or indirectly on water resources to maintain safe operating temperatures. As climate change intensifies pressure on water availability in many regions, it is up to the engineers to solve the challenge of balancing operational requirements with responsible resource management. ‘Resilience’ is the new buzzword This reflects a broader trend highlighted in EFCA’s recent ‘Future Trends Report on Water Resilience’.

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Mihai Barcanescu, Policy Manager, EFCA.

The report emphasises that Europe’s infrastructure systems can no longer be considered in isolation. Energy, water, digital networks and the built environment are becoming increasingly interconnected. A disruption affecting one system will rapidly cascade through others, creating significant economic and societal consequences. Similar conclusions emerged from our ‘Future Trends Report on ICT Resilience’. Digital infrastructure must be viewed as critical infrastructure and planned accordingly. Resilience can no longer be treated as an afterthought or limited to cybersecurity considerations alone. Instead, it must be embedded from the earliest stages of project development, encompassing physical assets, utility connections, operational continuity and environmental risks. Moreover, as shown in our article from the April issue of the magazine, security must include direct armed attacks on data centres, as it has recently happened in the Gulf and Middle East countries.

About the EFCA

“As Europe accelerates its digital transition, the success of data centre development will depend on more than processors, algorithms and network capacity. It will rely on the quality of the physical infrastructure supporting these technologies, infrastructure which must be resilient, sustainable and resource-efficient by design.” For data centres, this means adopting a holistic design approach. Reliable grid connections remain essential, but so do efficient cooling solutions, sustainable water management strategies, climate adaptation measures and robust building structures and systems capable of withstanding harsh operating conditions, from extreme weather events to utility failures and (cyber)attacks. From AI to infrastructure: why engineering matters Engineering consultants play a central role in achieving these objectives. Their expertise and capacity to integrate cross-disciplinary solutions help clients design and build stateof-the-art data centres, optimise performance, reduce resource consumption and strengthen resilience throughout the facility lifecycle. These shape investment decisions, risk management strategies and long-term planning.

The European Federation of Engineering Consultancy Associations (EFCA) is the leading trade association representing the engineering consultancy and professional services sector across Europe. Headquartered in Brussels, it advocates on behalf of national member associations that collectively represent tens of thousands of engineering firms involved in infrastructure, energy, and digital transition projects. EFCA works directly with European institutions to shape public policy, champion sustainable built environment solutions and promote cross-disciplinary engineering expertise across the continent.

As Europe accelerates its digital transition, the success of data centre development will depend on more than processors, algorithms and network capacity. It will rely on the quality of the physical infrastructure supporting these technologies, infrastructure which must be resilient, sustainable and resource-efficient by design. Ultimately, Europe’s digital ambitions will be realised not only through technological innovation, but through the engineering expertise that underpins it. The path and challenge ahead are therefore clear: building a digital future that is as resilient as it is connected. In conclusion To secure its digital sovereignty, Europe must look beyond grid capacity and address the physical, environmental and security foundations of its expanding data infrastructure. Algorithms and processing power alone cannot safeguard the digital economy against water scarcity, extreme climate events or physical threats. By prioritising holistic design, crossdisciplinary eengineering andsolutions and resource efficiency from the very beginning, Europe can establish a robust digital backbone – ensuring that its technological transformation remains as resilient and sustainable as it is ambitious.

64 Building Services Engineering I September/October 2026

APPOINTMENTS Wavin appoints Maxine Cornelius as Commercial Director UK and Ireland

Wavin has announced the appointment of Maxine Cornelius as its new Commercial Director for the UK and Ireland to lead its UK and Ireland sales operations, with a clear brief to strengthen support for merchants and installers. Overseeing the full building and infrastructure range, she will focus on delivering cohesive customer engagement and a commercial strategy designed to help the trade grow sustainably. Alongside her UK responsibilities, a key area of focus for Maxine will be developing the Wavin Ireland business, working closely with the Wavin Ireland sales team, led by Declan Conlon, Sales Director, Wavin Ireland. She joins from City Plumbing, one of the

UK’s largest builders’ merchants, bringing extensive merchant-side expertise. During her time as managing director for sales in the business, she played a pivotal role in driving growth and commercial performance. Commenting on the appointment, Maxine Cornelius said: “I’m thrilled to be joining Wavin, an organisation whose purpose and values closely align with my own. I’m particularly excited to work with our merchant partners in the UK and Ireland, continuing to build upon the strong relationships the team has built over the years. I look forward to working with the sales team to deepen these collaborations, drive growth, and deliver even greater value with our partners.” Dan Scott, Vice President for Wavin’s Northern Europe business unit, added: “Maxine brings a wealth of experience to the sales team at Wavin. Her previous roles on the merchant side of the construction supply chain give her a distinct edge, and

Panasonic announces Eamonn Kent as Air-to-Water Team Supervisor for Ireland

Panasonic Heating & Cooling Solutions has announced the appointment of Eamonn Kent to the role of Air-to-Water Team

Eamonn Kent, Air-toWater Team Supervisor, Panasonic Ireland.

Maxine Cornelius, Commercial Director, UK and Ireland, Wavin.

I’m confident this valuable insight and experience will help to drive a meaningful impact across all areas of the business. Her appointment continues to enhance our team of expert leaders, putting us in a strong position to serve our customers,

Supervisor for Panasonic Ireland, further strengthening its growing team and support for customers and partners while helping to advance more sustainable heating across the Irish market. He will oversee Panasonic’s dedicated air-to-water team activity in Ireland, supporting the continued growth of the company’s Aquarea heat pump solutions as demand for low-carbon heating technologies accelerates across the country. Commenting on his new role, Eamonn Kent said, “I’m delighted to be taking on the role of Air-to-Water Team Supervisor for Panasonic Ireland. The heat pump market continues to grow at pace, and it’s an exciting time to be supporting installers, partners and customers with solutions that can help deliver more efficient, low-carbon heating. I’m looking forward to building on the work already underway and representing Panasonic in wider industry discussions.” Laurence Cox, Country Manager for Ireland at Panasonic Heating & Cooling Solutions, added: “Eamonn’s promotion is a welldeserved recognition of his experience, technical knowledge and commitment to our Irish air-to-water business. His market insight and strong customer and partner relationships will be invaluable as we continue supporting the growth of low-carbon heating across Ireland.” Panasonic’s Aquarea range of air-to-water heat pumps is designed to provide efficient, reliable heating and hot water for a wide range of property types, supporting homeowners, developers and building professionals as they move towards more sustainable heating systems.

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Building Services Engineering I November/December 2025 1

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Home owner Alan Rasmussen

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Building Services Engineering September October 2026