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Last seen: Aug 24, 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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Degrees of Separation
Latest Posts
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 35 minutes ago
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@kilgorexv, I actually think doing your own calculation...
By Mars , 42 minutes ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 15 hours ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 1 day ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 2 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 2 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
By JamesPa , 2 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 2 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 5 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
By SCH , 5 days ago
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
By Majordennisbloodnok , 6 days ago
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