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Last seen: Aug 20, 2026
Yes sorry £1 per day is what I meant. 1K per kWh is a figure I have seen quoted more than once for a 'professional' install. £160 per kWh changes t...
Emissivity certainly comes into it but is not strictly the whole story - because radiators aren't predominantly radiators, they are predominantly conv...
Yes with reservations. If the house cools materially during the 'off' period then the average IAT will be lower than the 'target' IAT and so the amou...
No. The amount of heat lost/gained by conduction/convection will be dependent on the surface roughness and the nature of the medium in which it is im...
@judith , @larry , @cathoderay Collecting the above together with my comments and those from @cathoderay A room by room fabric spreadshe...
Im not entirely sure what this comment is intended to convey. My analysis is as follows - there are various ways of getting at essentially t...
It is this averaged over 24hrs. The reason I think that the daily averaging is useful is that it distinguishes days when its cold all day from iso...
try/p> If you have a smart meter you have, or at worse your energy supplier has, half hourly gas meter readings. That's pretty close to energy i...
Which is pretty good I would say The only check I would want to do is plot daily energy against degree days. There is a risk that plotting instanta...
@majordennisbloodnok @cathoderay As I say above the major issue with any short term measurement is the heat capacity of the house which will, i...
An equilibrium state is pretty much spot on, because it means that the fabric of the house will neither absorb nor emit energy, which means you are me...
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Latest Posts
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
Cloudy one done, might get the sunny one tomorrow or de...
By Watcher , 12 hours 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...
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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...
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At the risk of going on: A slight side issue for a foru...
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
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RE: Mitsubishi Ecodan FTC6 settings
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RE: PV and battery long payback - sense check query
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Readers here please note that Derril Water and many oth...
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RE: Advice on Vaillant Sensocomfort
Oops, I meant Sensocomfort (the UI to the controls)
By Batpred , 3 days ago
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RE: Heat Pump Training vs. Real-World Installation
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RE: Flushing system, cleaning and inhibitor
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RE: 'Chinese Diesel Heater' to heat the home .....
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