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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?

@derek-m - I agree, see above, the efficiency loss caused by raising the LWT matters, but I still think empirical data is the best way to determine ho...

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

I have in fact covered this elsewhere, things do get rather scattered all over the place, and @derek-m also covers it above. It is one of the factors ...

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

Another possibly (or possibly not) interesting insight. I have now changed (in the data file) the Set LWT during the non WC period to what it actually...

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

I have now determined that the 1800 run of the auto-adapt script yesterday somehow turned off the WCC, and put the heat pump into fixed flow temp mode...

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

"Which of those wins" - that is exactly the question that I am trying here to answer empirically. It is fair to say that a number of opinions have bee...

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

But we aren't trying to back fill the preceding valley, so to speak. Consider setbacks of varying lengths, let's say four hours and eight hours (set b...

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

This is absolutely the way to go, and the only way to get real world answers. Your sudden jump at 0700 (which I think may refer to 0600 to 0700, de...

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

@gary @newhouse87 - I don't have UFH or an off peak tariff, so my current strategy is a bit different. I do have a house with a high thermal mass for ...

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

Standard weather compensation doesn't work well with setbacks, the logic uses only the OAT and doesn't know the IAT is below what it should be. I di...

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

The latest 48 hours data, comparing last night's data with the night before: Note that yesterday (1700) I increased the default right hand en...

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

@derek-m - no problem, here they are (posted publicly in the interests of open data etc etc; the relevant column heads should be self explanatory eg a...

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

I agree, the setback is used to effect an on/off switch (and have said as much more than once!). Limiting the drop in IAT as you suggest is certainly ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 92 / 175
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