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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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Reply
RE: Installing a heat pump in a Grade II listed property

@jamespa - thanks, will get back to this later, I am about to get stuck in to some ceiling repairs!

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

It does vary. Here is the chart again: On this chart it is more often 2-3 degrees. You can also the the warming caused by the heat pump turning of...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

It was probably me, but I think it also applies to many if not most heat pumps, because the immediate environment, specifically the air temperature, i...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

Sorry, I hope it is all there, but I didn't explain it well. Starting with your IAT/OAT delta t values (19/10 to 16/10 for 6 hours etc), instead of ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

The AUC calculations I did were for the whole week, with hourly intervals. I think the idea that daily setbacks put the whole in a 'different place'...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

Another thought has occurred to me. Maybe the monolithic house, once it is up to temperature, is such a huge heat (energy) store that you can turn off...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

I deliberately used the regression equation from test week, so they should be representative. The average IAT did change over the period, but only sli...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

I do quite a lot of sailing, which is why I am interested in forecast accuracy, particularly for wind speed and direction, but also for visibility, he...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

I agree, but I think there are sufficient caveats. In particular, my post that reported my findings ended with a statement that my findings were not d...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

This is an important point, the effects of poor (and for that matter mediocre and good) design and adjustment are effectively unknown unknowns. While ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

@showi - thank you, that is very kind of you! We are, like Sisyphus, condemned to roll this ball forever! I will get back to you tomorrow.

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

There has indeed been a lot of discussion about whether setbacks save money and/or compromise comfort, including this mega-thread. The answer is not s...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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