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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 12, 2025
Profile Activity
Topics: 17 / Replies: 2131
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RE: Do setbacks save energy without compromising comfort?

Whether this is the case or not is in the data. Generally it is within a degree or so of the desired IAT. It has periods of minor over and undershoot ...

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

There does seem to be a lot of hindsight present in this thread these days. When I wrote the thread title, I had no idea how the thread and analysis w...

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

Counter-intuitive perhaps, but it still doesn't matter. I suggest you are trying to get an exact answer to the wrong question, instead, what matters i...

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

It's not my airy-fairy logic, it's the regression which shows the OAT as measured by the heat pump can predict the energy in. It doesn't (within reaso...

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

Very interesting! Perhaps I because I normally deal with medical/epidemiological data, which is invariably a very long way from tidy, I do like scatte...

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

The 'several degrees' is simply not true, unless your version of several includes a few, ie one or two possibly very occasionally three degrees. See t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Electricity price predictions

I found an announcement and a link here. This is a direct link to a PDF of the letter (link downloads the pdf). If neither of the above work, let ...

2 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Do setbacks save energy without compromising comfort?

Not sure I agree with this, as the control period range spans almost all of the setback period range, meaning the extrapolation is small, and only app...

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

@jamespa - these may be of interest: plots of the periods at the end of the last heating season and the start of this heating season, when there were ...

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

I agree, and there is also the uptick at the left hand end very possibly due to declining COP as Set LWT increases. However, extrapolating beyond the ...

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

I do agree, how the the circulating pumps are treated for energy use is an unknown. I've been inclined to suppose they were part, maybe most, of the e...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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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