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Josephiah
Josephiah
@josephiah
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Joined: Oct 29, 2023
Last seen: Apr 9, 2026
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Topics: 3 / Replies: 36
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RE: Do setbacks save energy without compromising comfort?

Agree with just about everything you've written there, but I think you may be missing a point (although you may well have covered this elsewhere) abou...

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

Agreed - my analysis is over-simplistic so far - we should expect to reduce consumption purely because the average temperature differential to outside...

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

Although, roughly speaking, the overshoot hill (above the average line) fits the size of the of the preceding valley (exactly, in fact, over the cours...

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

Interesting to see your findings, @cathoderay. From what I can see in my own n=1 study (this house (which is large and fairly well insulated, but wit...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant AroTherm controls issue

Thanks for the suggestions, both. @gary Yes, it behaves as you would expect for the 17°C setback - switches off for a couple of hours, then when it ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant AroTherm controls issue

A few more quick experiments last night/this morning: 1. Resetting the control unit yesterday evening had no discernable effect. Same setback to 17°...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant AroTherm controls issue

Resetting the control unit made no difference at all. I can make immediate changes no problem, but they are overridden by the phantom schedule setting...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant AroTherm controls issue

@derek-m Thanks. Will give that a go later. It seems like that shouldn't be necessary (as it would rather defeat the purpose of having a wall/app prog...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant AroTherm controls issue

Update: Yesterday I deleted out all the time periods and set it to manual 20°C (again), and last night it resolutely drifted down to 17°C and this m...

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

Interesting to see, thanks. I had started running my own experiments (using the limited data from my HP's (unimpressive) app), but have discovered a w...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Vaillant AroTherm controls issue
3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 19
Views: 12655
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RE: Heat pumps and on/off working - starting to quantify it

Thanks for the comments and explanations everyone. The observation about running hard to recover the lost energy fits with what I'm seeing (from basi...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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