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Building Services Engineering l July/August 2021
Meeting NZEB requirements with Vokera gas boiler Contrary to popular belief, it is possible to meet the requirements of NZEB for domestic dwellings with a high-efficiency gas boiler. Combined with PV panels, the all-new Vision Plus condensing boiler range from Vokèra by Riello can meet the current legislation. Vision Plus adds to the features and benefits of its predecessor – including new stainless steel heat exchanger technology on selected models – to offer high flexibility in performance and installation for a wide variety of domestic applications. Vokèra, through its parent company Riello Group, is a part of Carrier, a leading global provider of innovative heating, ventilating and air conditioning (HVAC), refrigeration, fire, security and building automation technologies. Class A energy efficiency Vision Plus combines Vokèra’s extensive knowledge of boiler design and performance in an innovative, installer-friendly range that offers Class A energy efficiency in accordance with the Energy Related Product (ErP) Directive. Neil Gaffney, Vokèra by Riello Country Manager for Ireland, said: “The addition of a relatively small PV array allows the Vision Plus to meet the criteria of NZEB, so making it a cost-effective and energy efficient solution for homes in gas grid areas.” All models are feature-packed
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to deliver energy-saving comfort and long-term reliability, and have the OpenTherm controls protocol embedded. The new range includes three system boilers with outputs of 20kW-30kW, all with a standard seven-year warranty. Stainless steel heat exchanger The new, optimised radial stainless steel heat exchanger enables a wide modulation ratio of 1:8 for optimum operating efficiency. Flexibility is also inbuilt. For instance, the system “heat-only” Vision Plus boilers can provide central heating;
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Above: The unobtrusive modern design of the Vision Plus.
can be matched with Vokèra Aqualow unvented cylinders to provide domestic hot water storage; and can be connected to any existing S-Plan or Y-Plan system. A wide modulation ratio ensures flexibility and efficiency and, thanks to the Modbus protocol, the entire Vision Plus range is designed to be “hybrid ready” for integration into lowcarbon heating system designs such as PV. For further flexibility, all system models boast a built-in relay, which allows for easy integration with zone valves. The future To meet the current and future integration needs of various energy sources, Vokèra is looking to introduce boilers with hydrogen functionality in the not too distant future. Contact: Neil Gaffney, Vokera Ireland. T: 086 - 856 6738; E: neil.gaffney@carrier.com; www.vokera.co.uk or follow Vokèra on: Facebook, Twitter, or LinkedIn. Q
Left: Internal cut-away of the new Vision Plus from Vokera.
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