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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 15, 2025
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Topics: 17 / Replies: 2075
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RE: Do setbacks save energy without compromising comfort?

Interesting to know that. I did wonder whether that might have something to do with it. It wasn't a smelly installation, but there is almost always a ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

@abernyte - ah, but you are making batty assumptions!! Note I said it was a lean to. It was an old privy about 6ft by 4ft that had been 'converted' in...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Here is my last 24 hours worth of data: Three clear defrost cycles, each with a marked uptick in OAT. There is also a clear three hour period ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Thanks for the explanation. My desired IAT is in fact 19 not 21 degrees, so the latter figures apply, and the OAT was at times close to 6 degrees, but...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Thanks for doing the modelling. It is still installed. Could you please elaborate on how why the PHE is the root cause? I don't have an absolute ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Of course I am sceptical of heat loss calculators - after all, they are classic whatiffery models! What if the walls are made of this and are that thi...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

I'm not sure they all are. The hallmark, at least on my system, of a defrost cycle is the LWT falls below the RWT (if you think about it, it does make...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

@harriup - thanks, especially for posting the charts. We now have data from three installations, yours mine and @kev-m's, and they all show some form ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

I wasn't suggesting it doesn't match demand in that quote, it fact the opposite, it does match demand in the conditions I was talking about. However, ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Here it is 24 hours from noon yesterday to noon today:

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Will post the data after I have had some lunch.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

My point is we are not in these conditions, warm house in mild conditions, where we know about and expect cycling as the only way further to modulate ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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