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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Jul 19, 2025
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Topics: 17 / Replies: 2064
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RE: Performance in the current cold snap…

@derek-m - I do wonder if it is time to drop the cold well seriously compromises my heat pump hypothesis, on the grounds that it seems increasingly li...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

This is one of the points I made earlier, cooling the local air is as far as I can see normal behaviour for a heat pump, and to that extent many if no...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@iancalderbank - your second chart, zooming in on a single defrost cycle, is interesting, in that, apart from the RWT, and a slightly different but no...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@derek-m - thanks. I'll see what I can come up with in the way of smoke bombs (what could possibly go wrong? Last autumn an awkward neighbour read me ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@derek-m - might you be mixing up 'normal' cycles and defrost cycles? I agree there is a loss over the PHE, meaning the LWT at the heat pump needs t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

They are mostly defrosts, identified by the LWT dipping below the RWT. In normal running in milder weather, is does cycle, probably because the Mid...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP controller

If you are willing to do a bit of work, there are other ways of getting Midea data. One is to use a python module called midea_ac_lan in something lik...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@hughf - yes and no. Yes if I put on extra layers of clothing, no if I don't. I'm old enough to remember getting dressed in bed as a child as we had m...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@hughf - it's painful. The last week:

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin problem

@togfather - I too have an old stone built home, a cottage rather than a barn, though listed. Unless you have done a lot of insulation and leak fixing...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Defrost Cycles - How Common Are They?

At the moment (just measured), rads ~47, primary in 53, secondary out 54 degrees (not a typo, either measurement error or some sort of lag effect perh...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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