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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Sep 15, 2025
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Topics: 17 / Replies: 2137
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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...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

11 months 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...

11 months 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...

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

Interesting (and a splodge is another example of what I recently called monkey plots). I wonder if the hourly plots fail because your system is very v...

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

It means what it says, but if you want a rewording it might be 'not for the first time the data is messy (incomplete, haywire values at extreme ends o...

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

Here we go again, messy data making monkey plots! What I have, and can and can't do: (1) minute by minute recorded data for all variables of interes...

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

@jamespa - thanks. I was reading something on that website as you posted on how degree days are calculated. It seems the preferred method integrates t...

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

@jamespa - we cross posted. I think there is a fundamental flaw in my suggested approach as described above, most people don't have access to the data...

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

And of course I can do this, measure energy out, but only because I have the data I do. Since most people don't have access to this data for their hea...

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

That is exactly what I have been doing, since early last year (late March)! On my standard chart, which is based on minute by minute data, you can see...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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