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Last seen: Oct 27, 2026
Thermodynamically it must be less efficient to cycle than not to cycle, because a higher flow temp is required to achieve the same output from the emi...
Generally I agree wholeheartedly with your sentiment. However excessive oversizing can lead to other problems. One of the MCS contractors who did a...
Imho the biggest problem is to determine 'right size'. The spreadsheet models, even if used correctly, make several more or less unverifiable assumpt...
I just re-read your post and noticed this which I missed first time round. The answer is a definite 'no'. The approach to 'name plate ratings' varie...
@derek-m Thanks, I look forward to 'playing'.
@bontwoody @squiff Also you must check the manufacturers capacity tables at the design OAT and FT. Some manufacturers 'name' their heat pumps very ...
I think that there are broadly two main use cases of interest namely 'in all day' and 'out all day'. Obviously this ignores more complex shift patter...
I think this is easily made intuitive by considering the limit situation, namely a building with zero thermal mass. In such a building it's obvious t...
Good question! The total used over the year will be the sum (mathematically the integral) of the instantaneous, so on this interpretation they are s...
A deceptively simple and important question but not actually that easy to calculate (for the avoidance of doubt I don't think the previous answer was ...
Science advances through a combination of theory and experiment. True also with engineering. Fitting an equation (to experimental data) is only one ...
Sorry, I wont be doing this because tariffs change all the time. But... if night time set back saves 10-20%, but you can somehow store energy at 20%...
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Degrees of Separation
Latest Posts
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RE: The good, the bad and the not that great – my heat pump installation
@editor I completely forgot to document wha...
By Burtis , 51 minutes 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 , 4 hours 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 , 4 hours ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
@trebor12345 That curve looks healthy to me. I woul...
By JamesPa , 5 hours 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 , 12 hours ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@susannasaunders can I just add to @rob-of-york s comm...
By JamesPa , 16 hours ago
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
By JamesPa , 16 hours 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 , 17 hours ago
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Good to hear that you found a solution. Absolutely a...
By Batpred , 17 hours 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 , 1 day 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 , 3 days ago
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 4 days ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
By EtchedPixels , 5 days ago
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RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
By Indevolt Tech , 5 days ago
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