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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Sep 11, 2025
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Topics: 17 / Replies: 2129
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Reply
RE: Do setbacks save energy without compromising comfort?

@jamespa - OK, here are my calculated energy values and the Midea energy values for the same time frame as in the earlier chart plotted one above the ...

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

Don't feel bad about this, intellectual rigour is essential, and I would rather be corrected than wrong! I think I get your reasoning, especially wi...

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

Perhaps another way of putting it is this: yes, the heat loss will be marginally lower during a setback, and we could even at a stretch call that 'sav...

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

I certainly welcome you questioning my data results and conclusions, as I have no divine way of getting things right, and am just as fallible as the n...

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

Very prudent. @jamespa- I'm working on it at the moment, I think I am onto something, but at the moment I am only about 50% sure I have the answer, ...

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

I do something similar behind the scenes, though my inputs for energy in are amps and volts. I then average them over the hour (I found this gives the...

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

I am not convinced you are going about this the right way. Normally you take a hypothesis (model), use it to make a prediction, and then test that aga...

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

I would, but at the moment I have what I think is the right balance between getting a saving and comfort. I have a bit of a cliff edge as the IAT fall...

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

The latest last 24 hours of data: Pretty much as before, steady and mild OAT at around 10 degrees, heat pump cycling around twice an hour to m...

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

I have never said all heat pumps are Mideas, quite the opposite, nor have I ever said all systems have primary and secondary pumps, again, quite the o...

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

@bob77 - I think your understanding is correct, at least for some systems - other heat pumps may/will vary, but on a Midea setup, the secondary pump i...

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

@derek-m - I think we need to consider whether there is a heat exchanger or not, and if so, which pump we are talking about. In my case there is, and ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Page 94 / 179
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