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Last seen: Oct 29, 2026
I think the first graph is the same as one you posted earlier? Subtracting one regression line from the other at any given OAT then dividing by the v...
@batpred ask them to itemise the basic instal pack!
So the 'nice' may well limit you to a small subset of heat pumps unless you want everything other than the highest to be on/off control on (built in) ...
er why? 15mm is good for about 3kW at DT5. Larger rooms in a typical 5-8kW house will need 1kW+ each but not smaller rooms. This is just being laz...
Loads of discussion on the forum over many years. To first order WC is WC independently of manufacturer and if you operate pure WC there is not much...
Thanks for the responses with which I generally agree. To address the implied question: Thanks I have been trying to think out what we want. ...
I 100% agree its absolutely excellent work, but before we attempt to draw general conclusions (which @cathoderay has, very sensibly, carefully avoided...
That 'core truth' is definitely the case. Adjusting the WC curve is something that is done once, and once only, and needs to be done slowly, with onl...
Great work! Are you by any chance able also to work out the average IAT with setback and non setback in a way that is strictly comparable. That wil...
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Degrees of Separation
Latest Posts
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@rob-of-york Thank you Rob! These are very good suggest...
By SusannaSaunders , 1 hour ago
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RE: Marvel Heating liquidation
The interesting thing about the IBG: when I called them...
By davidnolan22 , 3 hours ago
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Boiler Upgrade Scheme funding reduced by circa £750 million in 2026 budget
The funding for the BUS grant appears to have been subj...
By Rob of York , 10 hours ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
JamesPa The chart explains well how the heat curve an...
By trebor12345 , 13 hours ago
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RE: Free app: run the immersion / heat pump from Growatt battery & solar surplus – no Home Assistant
Please bear in mind, everyone, that in order to use thi...
By Majordennisbloodnok , 1 day ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis Thanks for posting this and Im so pleased you ...
By JamesPa , 2 days ago
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RE: I need help with Ecodan ASHP
@f1p It turns out there have been a solar panel install...
By Andris , 2 days ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews your installer would be right to say that the...
By GrahamF , 2 days ago
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RE: Tradespeople on Their Phones: What’s Acceptable When They’re Working in Your Home?
Actually, that's a very important point. I've only ev...
By Majordennisbloodnok , 2 days ago
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
By JamesPa , 3 days ago
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RE: Electrical works for air to air heat pump
agree with above. I have not had extra costs added wh...
By Batpred , 3 days ago
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Good to hear that you found a solution. Absolutely a...
By Batpred , 3 days ago
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RE: Are there any comparisons of DHW heat stores around?
@sarahemmm I have done things the opposite way round I ...
By Toodles , 3 days ago
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RE: How will removing the standing charge on gas bills benefit heat pumps?
The BUS grant funding for 2026/27 will run out at the c...
By Rob of York , 4 days ago
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