GK22 Posted May 30, 2023 Share Posted May 30, 2023 Hi All I have been looking at ASHP and DHW for my self build. I have attached a quote from a specialist supplier. This is supply only. I am going for a MBC passive standard and hope to achieve excellent air tightness and u values. MBC will also lay the UFH pipes for GF. I was not planning on any UFH for FF. The quote insists on UFH for both GF and FF. To be eligible for the BUS grant. My questions are 1. Is this quote reasonable? 2. Have they got the ASHP capacity right? 3. Is RIELLO a good brand 4. How do I get around the issue of the UFH ? As always very thankful for all the help and support. BW G ASHP BH.pdf Link to comment Share on other sites More sharing options...
JohnMo Posted May 30, 2023 Share Posted May 30, 2023 First question is they have just used building regs to size. Are you better than that, do you have good airtightness? By the way the price is bonkers, same answer even if an installed price. The ASHP unit is made by Midea. Link to comment Share on other sites More sharing options...
Conor Posted May 30, 2023 Share Posted May 30, 2023 Another joke quote. These grants and shoddy predator installers are a real issue. Link to comment Share on other sites More sharing options...
Post and beam Posted May 30, 2023 Share Posted May 30, 2023 The 'quote' actually says estimate. Beware. There does appear to be a failure to understand what the word quote actually means. That price is about as bad as the worst i have had, from Nuheat as it happens. Link to comment Share on other sites More sharing options...
MR10 Posted May 30, 2023 Share Posted May 30, 2023 1. No 2. No - I think 16kW ASHP is way oversized for a passive(ish) house 3. Answered above 4. It's your house, tell the supplier to exclude FF UFH. Get other quotes from other suppliers/installers. Link to comment Share on other sites More sharing options...
nod Posted May 30, 2023 Share Posted May 30, 2023 Crazy prices Link to comment Share on other sites More sharing options...
joth Posted May 30, 2023 Share Posted May 30, 2023 2 hours ago, GK22 said: The quote insists on UFH for both GF and FF. To be eligible for the BUS grant. BUS requires that the installed system supplies "all" the space heating needs. You need to establish that the ground floor UFH is sufficient to meet the whole house peak heating demand. Increase density of pipes in the GF if needed to increase the W/m2 (rarely necessary in a passivehaus). (Also if you have underfloor electric matting or towel rads in FF bathrooms be clear that is for luxury comfort only and not needed to meet the building's heat demand) End of day if this installer won't give what you want, take your money elsewhere. Link to comment Share on other sites More sharing options...
MikeSharp01 Posted May 30, 2023 Share Posted May 30, 2023 Wonder how big your passive house would need to be to stretch this heat pump to its limits: https://www.bbc.co.uk/news/business-65321487 it can boil a whole Olympic swimming pool of water in less than 4 hours. Link to comment Share on other sites More sharing options...
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