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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Nov 16, 2025
Profile Activity
Topics: 17 / Replies: 2348
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RE: Do setbacks save energy without compromising comfort?

The basic answer to this question (is there a vampire load and/or secondary heating source) is relatively straightforward. As far as I can tell, there...

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

I absolute do get it, and have done so for a time, but only with hindsight. At design/installation time the installer and I hadn't seen the Midea engi...

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

Not quite right: the available wall space was a significant constraint (no huge rads, allowing a lower LWT), but by using K3s and a high LWT, I could ...

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

@jamespa - all very interesting, with much to think about. The sun is shinning and I have other things to do today, but I will think about things as a...

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 I agree about the modelling, though I do 100% agree about more data. The R square values just tell us there is good correlation, which ca...

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

Welcome to the forum! By a curious coincidence, I used exactly the same quote back in the ancient mists of pre-history in this thread! This has b...

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

I said I thought I might have the answer, and I think on one level (though there are others), it is when you impose a return to baseline constraint ov...

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

Methodology note (only read if this interests you!): how to get the regression coefficient CIs in LibreOffice Calc This needs a work around. You...

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

@jamespa - I am digesting your latest comment but while I am doing that, there is a question I have been meaning to ask for a while, the answer to whi...

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

It varies, because of my auto-adaption script, which provides the recovery boost. However, much of the time it is 56 @ -4 / 34 @ 15. When the actual I...

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

I think that is a very reasonable statement of aims. Set out what we do know (plus any caveats) and let folks decide for themselves. I've now got ri...

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

I do, and I know why you are concerned about the constant's size relative to the output variable range! It seems like it is do-able in R. Crude p...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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