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Last seen: Aug 25, 2026
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%...
I assume a COP of 4 at the starting conditions (but you can adjust the value in the spreadsheet). In the forced recovery model the FT changes so the ...
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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 , 11 hours ago
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@kilgorexv, I actually think doing your own calculation...
By Mars , 12 hours 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 , 1 day 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 , 2 days 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 , 2 days 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 , 3 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 , 6 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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