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jamespetts
@jamespetts
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Joined: Nov 4, 2024
Last seen: Sep 10, 2025
Profile Activity
Topics: 3 / Replies: 26
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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...

18 hours 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 ...

23 hours ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

1 day ago
Forum
Your Home
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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...

1 day 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:...

2 days ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
COP is not the only measure of efficiency
2 days ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 8
Views: 59
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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...

2 days 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...

2 days 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>  

2 days ago
Forum
Solar Photovoltaic (PV)
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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...

2 days ago
Forum
Domestic Hot Water & Cylinders
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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...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Shutting down heating when out for the day - data

So far, the house has been comfortably warm when I get home. The door to door journey is about an hour, although yesterday, I stopped to talk to some ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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