Cronins Wood Killarney Case Study

CASE STUDY

Cronin's Wood Multi-Unit Residential Development Killarney, Co Kerry, Ireland

CASE STUDY: CRONIN'S WOOD, KILLARNEY, CO KERRY

ABOUT THE CLIENT AND PROJECT Cronin’s Wood is a multi-unit residential scheme in Killarney comprising of 249 homes. The delivery team included KPH Construction (Builder), Meitheal Design Partners (Architect), DKP (Consulting Engineer), NOC Heating and Plumbing (Mechanical Installer) and Dennehy Electrical (Electrical Installer).

The project consisted of multiple dwelling types including terraced, semi-detached, and detached houses. There were a small number of apartments with electric heating.

The client’s key objectives were: Provision of a two-zone heating layout in each dwelling with steel panel radiators on both floors, sized for low/medium flow temperatures to optimise heat-pump efficiency.

Standardisation - utilise a small number of uniform “house types” - to simplify procurement and installation.

Comfort & control - consistent temperatures, fast response, simple user interfaces.

Compliance - meet or exceed Part L requirements and relevant standards, with verifiable performance data.

Reliability and Service - minimise call-backs and snagging and prioritise high quality commissioning and after-sales.

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CASE STUDY: CRONIN'S WOOD, KILLARNEY, CO KERRY

SOLUTION OVERVIEW The consulting engineers, D & K Partnership, specified a standardised renewable heating system across all units.

Each dwelling is equipped with a Mitsubishi PUZ-WM50VHA monobloc air-to-water heat pump paired with a Mitsubishi EHPT20X-MHEDWR1 pre-packaged cylinder and FTC7 control system. This combination provides space heating via steel panel radiators on both floors and delivers efficient domestic hot water production using plate heat exchanger technology for rapid recovery.

The use of R32, environmentally friendly, low GWP refrigerant and the monobloc design ensures regulatory compliance and reduced installation complexity.

System Design Each dwelling features two heating zones and occupants can independently control ground and first-floor temperatures.

The system’s FTC7 controller uses weather compensation to modulate flow temperature in response to outdoor conditions, maintaining optimal heat pump efficiency under varying loads.

Domestic hot water is produced by the integrated pre-packaged cylinder, which includes a 3 kW immersion heater for legionella control.

PUZ-WM50 outdoor unit at Cronin’s Wood

The design ensures ease of commissioning, consistency across units, and simplified service support for long-term operation.

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CASE STUDY: CRONIN'S WOOD, KILLARNEY, CO KERRY

Mitsubishi PUZ-WM50VHA Monobloc Air-to-Water Heat Pump The Mitsubishi PUZ-WM50VHA was chosen as it delivers a maximum output of approximately 5 kW (A7/W35) and achieves flow temperatures up to 60°C. Typical SCOP values exceed 4.0, supporting compliance with NZEB and SEAI performance requirements.

Notable Features Monobloc design eliminates the need for F-Gas certification during installation.

Inverter-driven compressor for precise capacity modulation and excellent performance.

Quiet operation suitable for residential environments.

FTC7 controller compatible with two heating zones

Mitsubishi EHPT20X-MHEDWR1 200L Pre-Packaged Water Heater – 200 Litre To provide fast, efficient domestic hot water production using integrated plate heat exchanger technology optimised for R32 monobloc heat pumps.

A Mitsubishi 200 litre pre-packaged indoor unit was specified as it delivers high recovery rates suitable for large domestic households. It also integrates a 3 kW immersion heater for legionella control. Note - 170L version was used in some of the smaller houses.

Notable Features EHPT20X in Cronin's Wood

Plate heat exchanger design improves DHW recovery times.

Factory pre-packaged with connections above Compact footprint suited to modern dwellings.

Automatic hot water temperature management.

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CASE STUDY: CRONIN'S WOOD, KILLARNEY, CO KERRY

INSTALLATION Installation was carried out by NOC Heating & Plumbing Ltd. The standardised system allowed easy installation and supported efficient phasing of works across the multi-unit development.

RVR Energy Technology provided technical support throughout the project and commissioning of all heat pumps. All parties worked together to maintain the project schedule.

Key Points Consistent comfort levels and rapid DHW recovery for all 249 dwellings.

Up to 70% reduction in primary energy usage compared with conventional boiler systems.

Environmentally friendly, low GWP operation using R32 refrigerant.

Simplified installation and minimal maintenance due to monobloc configuration.

The system achieves compliance with Part L and NZEB regulations, positioning the development as a model for sustainable housing in Ireland.

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PROJECT PARTNERS Developer / Builder: KPH Construction Architect: Meitheal Design Partners Consulting Engineer: D & K Partnership Mechanical Contractor: NOC Heating & Plumbing Ltd Electrical Contractor: Dennehy Electrical Heat Pump Supplier: RVR Energy Technology Ltd

RVR Energy Technology Ltd Kenmare, Co. Kerry V93 F386 064 6641344 | www.rvr.ie | info@rvr.ie