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jamespetts
@jamespetts
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Joined: Nov 4, 2024
Last seen: Sep 21, 2025
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Topics: 3 / Replies: 27
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RE: COP is not the only measure of efficiency

For unoccupied rooms when I am home, I do use setback temperatures on the TRVs. When I am not at home at all, however, I turn the heating off entirely...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Who’s Caved and Switched the Heating On Already?

  Yes, there is definitely scope for heat pump controllers to become much more efficient with better automation. The best solution until that h...

3 months ago
Forum
Your Home
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RE: COP is not the only measure of efficiency

I am a little sceptical of this, not least because, in an old house like mine, the insulation between the rooms and other rooms is not much different ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who’s Caved and Switched the Heating On Already?

I have automated this decision. I have a heat pump with weather compensation, but had noticed that it was coming on in the early mornings when the tem...

3 months ago
Forum
Your Home
Reply
RE: COP is not the only measure of efficiency

Can I clarify - is the LSV the manual balancing valve? That would not be much use to me, as there are not rooms that I always want to be colder: rathe...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: COP is not the only measure of efficiency

@toodles Your use case is indeed very different to mine, and much closer to the COP optimum, I expect. I agree that comfort is relevant to efficiency:...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
COP is not the only measure of efficiency
3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 11
Views: 725
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RE: Solar Thermal DHW and ASHP

I was originally contemplating a solar thermal installation last year. However, I decided in the end to install solar PV instead together with my heat...

3 months ago
Forum
Solar Thermal & Power Diverters
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RE: Anyone still weathering it out with Agile?

I have been using Agile since last October. Like another poster here, I use Home Assistant to make the most of it, automatically heating my water at t...

3 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
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RE: Solar Power Output – Let’s Compare Generation Figures

My system installed in July 2024 has produced 6.4mWh in 2025 so far and produced 2.2mWh in 2024. Details on my Enphase public page here:/p>  

3 months ago
Forum
Solar Photovoltaic (PV)
Reply
RE: 300 Liter Tank - Do I have to heat it all?

I do not think that a 300l cylinder is too big for a two person household. I live in a 1 person household and have a 250l cylinder, which is just abou...

3 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: New heat pump (Vaillant Arotherm + 7kW) performing better than installers expected?

I think that I may have found the lower heat curve limit: I had turned it down to 0.45 yesterday, but I have had to turn it back up to 0.5 again as th...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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