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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Nov 21, 2025
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Topics: 17 / Replies: 2352
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RE: Observation about radiators and weather compensation

@ronin92 - these temps are not easy to measure accurately. The clip on thermometers are typically +/- 5 degrees so not discriminating enough. I use a ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@derek-m - Thank you for the detailed explanation of the principles behind how a PHE works. That is indeed my understanding of the principles, though ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@derek-m - yes, we did, but didn't get to the bottom of it, largely because there weren't cold enough ambients to test the system. @kev-m - I agree ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@kev-m - that's interesting, and makes sense, and fits with what I observed about the power reading in the Midea controller, around 5kW when it was on...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

@editor - useful images. Using my rather more basic IR thermometer I continue to have a roughly 5 degree difference between the top and bottom of most...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Observation about radiators and weather compensation

My flow temp is 34 deg now and my kitchen rad is definitely cooler on the bottom (with my uncalibrated but able to register differences quite well, ha...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Boiler Upgrade Scheme (BUS) monthly statistics August 2022

@editor - these stats are always fascinating. Or perhaps I should get out more often. A couple of quotes: "Since applications for grants opened for ...

3 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: 14kW Midea ASHP in an old leaky building

Very informative. Unfortunately I was tied to using a Midea unit, by virtue of it being baked into the planning and listed building consents. The Mide...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

Indeed it is, but it is currently summer, so no need for 16kW, plus I am wary of voiding my warranty because I have tinkered with the settings, hence ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@derek-m - thanks for posting this spreadsheet again, it is worthy of many postings! Total Heating Elements output (at delta t 50, ie fossil fuel delt...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

It's a long story, spread out over many months, and covered in some detail in earlier posts in this thread. In summary, it was specified by my install...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

You may well be right, but I don't think I can be sure, because two things changed, but not quite at the same time: the outside temp and the heat pump...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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