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Last seen: Oct 27, 2026
AFAIK they all do have frost protection built in, just like fossil fuel boilers. It should override any set back (again just like fossil fuel boilers...
Unfortunately most heat pumps are either a) direct descendants of air conditioners originally designed to cool or b) not designed for a mild but damp ...
Imho any installer/specifier who doesn't do this is an incompetent fraud. It's a pretty basic requirement to match the actual declared capacity of th...
In answer to the last question, emphatically no in my view. More generally there will always be an offset between the modelled net heat loss and the...
Thanks, that seems like a good analysis. My car does something similar to your heat pump. If I drive then park, when I return to the car the reporte...
Thanks. Nothing is simple about heating! My observation about the discrepancy of the onset of cycling between the model and the measurements was ac...
Thanks for the update but I confess Im now a bit lost. 'The raw data' is presumably actual data from a real heat pump, was it @cathoderay 's or someo...
The wc is a curve because of the emitter power vs ft curve, (which I have been told is linear for ufh, but have not verified). So far as I can tell ...
@derek-m I'm not certain what these are telling us. Am I comparing calculated vs actual iat, in which case there seems to be a small divergence which...
Agreed Agreed (sadly but inevitably) Just bear in mind that we need as much data for the 'control' (ie without setback) as we do for the se...
Thanks for the extra data. 1C reduction in IAT should in theory reduce energy consumption by 1/(IAT-OAT). If IAT is 20 and OAT is 10 that's 10%. A...
For what it is worth I'm fairly comfortable that modelling results predict modest savings (3-5%) for mild OATs with a setback regime that for many wil...
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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
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RE: Aerotherm and weather compensation
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RE: Electrical works for air to air heat pump
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Good to hear that you found a solution. Absolutely a...
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RE: Are there any comparisons of DHW heat stores around?
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