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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 15, 2025
Profile Activity
Topics: 17 / Replies: 2133
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RE: 14kW Midea ASHP in an old leaky building

1800 hours: bedroom 17.5 (vs 19) bathroom 20.0 (vs 22) kitchen 17.4 (vs 19). All have benefited from recent solar gain, especially bathroom and kitche...

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

@batalto - I'm currently on the standard Freedom weather com curve, 55@-2/37@15. Bumping up the top end will do even nastier things to my COPs and is ...

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

@batalto - my provisional conclusions are that the problem, or part of the problem, the PHE may also be partly to blame, is the nominal 14kW Midea hea...

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

@batalto - yes, in effect, I had my full room by room heat loss calcs from when I first designed installed the CH in the 1980s, and I also had the hea...

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

@kev-m - there are indeed many factors at work. I suspected a capacity problem at lower ambients because if you put the correct Midea capacity data (o...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Name and shame heat pump installers that have done shoddy work

@saz - the Heat Loss Calculator worksheet isn't to bad, but it is complex, with a lot of detail needing to be entered, and it only needs one small typ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Name and shame heat pump installers that have done shoddy work

I have just posted a comment on my previous thread, to the effect that my heating system is not fit for purpose. But I don't blame my installer, who a...

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

At last a cold spell to test the heating and see whether it can cope - it can't. The nominally 14kW Midea ASHP is incapable of warming the house to de...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Install from hell part 1 - the schematic - EXPERTS PLEASE VIEW

I have said it before and will say it again - it is very clear MCS is not fit for purpose. I was first alerted to this by the fact that over half (60%...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea and very possibly other controllers networking

@majordennisbloodnok - thanks, that is all very helpful. The laptop normally runs Windows, but I might be able to run Linux from a USB stick, and star...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Midea and very possibly other controllers networking

I think the laptop/Midea controller wifi connection is a second network, insofar as it is two devices connected to each other. Need to make use of the...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

@robl - the all off bar one, one by one testing is a good idea, might highlight a problem rad/section of pipework. And a good point about constant pre...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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