APPROACHES TO HEATING & RENEWABLES FOR THE FUTURE HOMES STANDARD ROUND TABLE REVIEW 35
HOT OFF THE PRESS: REVIEWING THE STANDARD’S IMPACT (Left to right), round table Chair & ADF Editor, James Parker; Abigail Woolf, Senior Energy and Carbon Advisor, UKGBC; Dr Jaydeep Bhadra, Domestic Sector Technical Manager, CIBSE; Mike Jones, National Specifi cation Manager, Garo Electric (event sponsor), Greg Jones, Residential Sector Lead, Hoare Lea
housebuilder in terms of saving time on installation, and reduced maintenance,” citing particular relevance for housing associations. Cheng said that there was still general “reluctance in the sector
to say, ‘let’s go in this direction,” fuelled by worries about “a lot of aftercare.” Mike Leonard cited a positive case study by Keepmoat of heat pumps plus UFH at Gedling Green, saying customers were happy based on overall comfort, and lack of radiators.
Air source heat pumps Nathan Tranter of Panasonic framed his question simply around the need to grow heat pump knowledge: “How can we help educate our existing network of installers onsite to now install new technologies such as ASHPs when they have only been focused on gas boilers? Tranter pointed out that with a “lot of new technology coming online for new homes, electricians haven’t really fully looked into how to install them.” He wondered whether a “whole ‘certifi cate matrix’ was needed for installers,” so they fully understood how to install but “most importantly how to commission them,” and if warranties should be dependent on such certifi cates. This was a point echoed by Greg Jones of Hoare Lea, who added that there might be “a different solution altogether” for urban high-rises. There was extended discussion of training approaches for installers, including Jaydeep Bhadra of CIBSE who said the Building Safety have recently formed a working group on heating and heating controls, which has the aim of “developing a training course which every institute can follow.” He said CIBSE and the Heat Pump Association were collaborating with the Regulator to “streamline this training and get it accredited.” Dan Jestico of Savills said there was “probably a huge amount
we could learn [from countries like Germany who have widely embraced heat pumps], in terms of installers and commissioning, and persistent problems and things to look out for.” He added: “The knowledge exists.”
The debate around heat pumps also ventured into the potential to run at lower temperatures than the common 55°C, which would not only reap carbon savings for developments but better EPC scores for homeowners. Our delegates emphasised it would not harm performance for end users either (the average shower temperature is between 37°C and 41°C). Nathan Tranter commented that on new builds, Panasonic was generally designing at 45°C, but said “the lower, the better.” He said the UK would do well to follow Europe on designing for lower water temperatures for higher pump effi ciencies. He admitted that radiator size “has always been a barrier, but cited initiatives Panasonic had been pursuing using standard 15 mm pipe connected to fan coils: “I can drop to 35°C and the radiator’s smaller than it would be for a gas boiler.” The panel also looked at the potential for heat pumps to work in reverse in future, when overheating will “become dominant,” said Lubo Jankovich, and using heat pumps for cooling with light fan coils was the preference rather than “larger and larger radiators.”
Waste water heat recovery
Ellis Maginn of Recoup Energy Solutions reviewed the uptake of the simple method for recovering heat from showers, given that heating water is set to become the biggest source of emissions in new homes. He asked whether the FHS plus the move towards electrifi cation “prioritised hot water demand reduction suffi ciently? And, does the
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