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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Nov 14, 2025
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Topics: 17 / Replies: 2348
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Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Indeed, onwards and upwards! This is almost certainly a factor in my case, see the SPAB report mentioned earlier. The spreadsheet model used U va...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Thanks for posting this. R squared 0.92, pretty good. Looks like around 240kWh at around -3 degrees C OAT, or 10kW power rating. Probably just ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

If many gas boilers can do true WC, ie no room stat interference, even less excuse not to do a trail in WC mode! For the record, how do gas boilers ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

@jamespa - your heat pump selection logic makes sense, and I also get the importance of aesthetics. This thread now demonstrates a fossil fuel boiler ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

@jamespa - an interesting chart, it shows the method working for a large fossil fuel data set. I suspect if you cleaned up the data a bit, you might g...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: MCS 2.0 - Changes in January 2025

But in an elevator?

1 year ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Which is why I have tried plotting 24 hour periods rather hourly periods, and sure enough the correlation does appear to be very good, remarkably good...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

@jamespa - you know I do! You can't have forgotten the many discussions we and others have had about it, some of which have got rather warm on occasio...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Energy input (used, consumed) you have, it's what your meter says it is, and you just total it for each day (or subtract previous reading from current...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Given this, and the fact you seem to have a fairly good consensus based assessment of your total heat loss, can you do what I did, that is find a peri...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

My suggestion is the heating is always on (on the timer) during any heat loss assessment exercise, set to a constant IAT, the only on/off activity wil...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

@majordennisbloodnok - interesting questions that I don't know the answer to, but the thinking behind them is the same line of thinking I had when I w...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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