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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Jul 24, 2025
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Topics: 17 / Replies: 2066
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RE: Installing a heat pump in a Grade II listed property

This is why I mentioned epidemiological observational studies, you have no control over the variables whatsoever. The main way you deal with that nowa...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is my setback/preheat doing any good?

@bontwoody - thanks for the replies. Inline probes should be accurate, but at the same time such a precipitous drop seems most unlikely, given the...

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

@jamespa - I suspected all along the answer might be 42. Now we have the answer, we can now work out the question, and I think you have phrased it w...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is my setback/preheat doing any good?

I think there is at least one thing that isn't right in that chart, the sudden precipitous drop in flow temp when the heat pump turns off. That doesn'...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

@iwolf - on my installation there are two flexible connectors connecting the heat pump flow and return to the fixed pipework where it passes through t...

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

It does correlate well already, at least the OAT/energy out are well correlated, that's the basis of the empirical method of determining heat loss. It...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

@paul436 - thanks, that would appear to confirm what i thought.

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

Not sure, but I think that may be the inline filter by the heat pump is blocked. Mine has a quarter turn valve to close of the pipework, and then you ...

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

@jamespa - this all sounds do-able, and I agree it is worth a try. To cover your various points: The heating was always on (with or without setback,...

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

I do already have a lot of data. Since late March 2023, I have been collecting data at minute intervals for all of the variables you mention, apart fr...

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

Thank you, it is. Your second paragraph also covers something I had been thinking about as well, the situation where a true but small inter-sample dif...

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

I wasn't looking for correlation, just gross eyeball differences between SB and no SB running. As I said, I can't think of any other way of presenting...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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