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JamesPa
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Oct 7, 2026
Profile Activity
Topics: 27 / Replies: 5456
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RE: Who do I complain to about a poor ECO4 installation, can anyone advise?

Great. My guess is that you will need to re-adjust your weather compensation curve to avoid unnecessarily high bills. Feel free to ask for advice h...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: How many people are happy with their ASHP and do you believe them?

For some actual data I recommend reading the NESTA survey from 2023, this is the largest and most comprehensive independent survey I know of about 200...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Loud noises in the night - and one for the toolbox?

I can't really suggest anything other than trying to narrow down the source location. Sorry.

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Loud noises in the night - and one for the toolbox?

  FWIW I used to get expansion noises from pipework under the floor with my gas system. Inevitably pipes move a bit, the coefficient of expans...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Loud noises in the night - and one for the toolbox?

Sounds like something expanding somewhere, perhaps then hitting up against something.

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump Operation in Summer - Valliant 7kW

Personal choice but without a doubt my heating pump copes better with the season ends than my boiler did. The boiler just overheated the house or cau...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump Operation in Summer - Valliant 7kW

We turned it off a few weeks ago then turned it back on again. Im expecting to turn it off again. Our house exhibits similar behaviour to that descr...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Forum updates, announcements & issues

got it!

5 months ago
Forum
Introductions, Forum Rules & Updates
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RE: Estimating true heat loss from twelve months of consumption data

They aren't. The problem is that thermal stores generally need high temperatures to store sufficient usable energy for typical hot water needs, much ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Capacity loss with aging

I think the laws of thermodynamics pretty much guarantee anything that starts of ordered gets less ordered, and this in turn pretty much guarantees it...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Sizing an ASHP; Heat loss and kW

Sorry OAT = Outdoor air temperature, IAT = indoor air temperature, FT = flow temperature, DT = difference between two temperatures, often flow and ret...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Sizing an ASHP; Heat loss and kW

Annual consumption is almost certainly better than an EPC. If you have daily consumption (which you can plot Vs OAT) and provided your house is reaso...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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