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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Nov 14, 2025
Profile Activity
Topics: 17 / Replies: 2348
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Reply
RE: ÀSHP heat loss - how close to perfect can we get?

@larry - I have now read the SPAB U value report in full, and it makes interesting reading, despite in places getting tangled up in putting up a basec...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: System pressure dropping on my Ecodan ASHP system

@spacebiscuit - this is an interesting question, why does an ASHP circuit need to be pressurised in the first place? I can't be, as it is with a tradi...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Very good to have your experience and expertise here, I am sure you have much to offer which I am sure others will welcome. Thanks too for the U Va...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Thanks, that's useful to know. I'll see what I can dig up. I guess that may mean you are an installer (which is fine - all are welcome here!)? Bu...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Any talk of 'mandatory' starts the hairs on the back of my neck rising. In close proximity to any mention of MCS, a discredited bunch of goons and sto...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

@toodles - we are, but back to basic principles: if two independent data sources agree, or are close, then that does generally suggest that both are a...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

I don't think, for my system, it is too bad, because I have some basic independent monitoring tools, and they broadly agree with the Midea data collec...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

That is certainly possible for the pipework, though the radiators are matched, plus a bit, to the 12kW heat loss, ie they are unlikely to be a bottlen...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

Unless it happens either (a) when you are asleep or (b) when you are out! Also bear in mind we only have to account for very roughly a doubling of the...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

I think that is very likely, but I didn't notice either because it happened overnight, or during the day when I was out or active. The other thing is ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

Me too. The only explanation I can come up with is that I fine tuned the timing so that I only heated the house when necessary, morning and evening. P...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

@jamespa - an update on historical oil use. I was going through some old papers recently and came across delivery slips and invoices for oil deliverie...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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