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Last seen: Oct 27, 2026
@paul1098 Just possibly you could find a regular plumber to do the pipework plus rads for 4k then get the heat pump installed free. You would have ...
Given that you are starting from scratch I think you are unlikely to achieve this unless you are lucky, do some gymnastics with the contracting, or do...
Yes that's true. So a combi is basically sized to deliver dhw demand 'real time'. For almost all houses this is way in excess of house loss or house...
OK so ZEB is basically a variant on a storage heater, but designed to interface to a water borne central heating system. It has a SCOP of 1, but beca...
I don't know what calculation is done by people fitting combis, but that one makes no sense for combis or heat pumps and vastly overstates the require...
@cathoderay The 'constant' has dimensions. Its the volumetric heat capacity of air in Wh/(Km^3) Thus if ach has the dimension 1/h it all works o...
I too had to reduce the hysteresis even though my dhw temp is set to 48. Occasionally with a reheat programmed once per day, it would be just hot eno...
Exactly that. Dimensional analysis (the powerful and occasionally useful technique of working out what the answer and the formula is measured in, in ...
Yes to the final sentence. There are actually two controls that do more or less the same thing if you operate on pure wc, namely the set temperature ...
You won't be able to achieve those simultaneously unless curve 0.2 happens to be exactly the correct curve for your house. To find the correct curve ...
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RE: I need help with Ecodan ASHP
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Actually, that's a very important point. I've only ev...
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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...
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RE: Aerotherm and weather compensation
These are likely inked. The basic explanation is tha...
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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 , 11 hours ago
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Good to hear that you found a solution. Absolutely a...
By Batpred , 12 hours ago
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RE: Are there any comparisons of DHW heat stores around?
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RE: 15kw pump for 225m2 1990's house - over kill?
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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...
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RE: Say hello and introduce yourself
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