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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 12, 2025
Profile Activity
Topics: 17 / Replies: 2834
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RE: Installing a heat pump in a Grade II listed property

Yes and Yes. Conservation of energy must eventually apply, but may take a long while for equilibrium to be re-attained, and my suspiscion is that in ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

The '10%' refers to the change in deltaT between IAT (20C->19C) and OAT (10C). House loss (which is how the '10%' is being used) is proportional ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

Provided the 'control' period from which these were derived is representative of the test period I would agree. If any changes have been made to the ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The good, the bad and the not that great – my heat pump installation

Dare I say 'builders innit' (i think that's the appropriate slang - but its not my specialist subject!). The electrical institutions, in fairness, h...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

True (which is one reason I advocate it for pump sizing), but it doesn't support extrapolation to other scenarios (ie houses) unless you have enough e...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Agile: average import cost vs other tariffs?

The conclusion is right but just to correct the units - you have a 10kWh battery and it charges at about 2.1kW. Think of kW like speed and kWh like ...

11 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Agile: average import cost vs other tariffs?

You could well be right. I didn't look into it that far because I fail Octopus Intelligent Go at the first hurdle. Although I have an EV its only co...

11 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Installing a heat pump in a Grade II listed property

I don't think so and hope not. I grant that heating, while fundamentally simple, is actually rather complex. However there is, in principle, a vast ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

All agreed, with the possible comment that theoretical models are (currently) invariably based on well adjusted/designed heat pump systems, and we kno...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Tarrif model for ASHPs

Thanks for this its always good to have some real numbers. In terms of judging payback I don't personally put ASHP and batteries in the same category...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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