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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 8, 2025
Profile Activity
Topics: 17 / Replies: 2679
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RE: Advice for ground source heat pump in new build with PV and batteries

The useful bit is the bit that specifies the heat loss at the design temp ( presumably around -3). It's your choice of course but I genuinely fear t...

3 months ago
Forum
Grounds Source Heat Pump (GSHPs)
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RE: Yes, the "zoning with ASHP" topic again...

@harryrea In a heat pump only system you are never heating space and DHW simultaneously because they require different flow temperatures. For the sam...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Yes, the "zoning with ASHP" topic again...

Ok so I think you consider it (structural zoning, not hybrids) mainstream. Fair enough. Let's consider a couple of fairly mainstream examples. a) ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice for ground source heat pump in new build with PV and batteries

I'm not an expert on SAP TBH but others here are. Could you post the full report (feel free to redact personal info) which will give a better insight...

3 months ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

I'm still struggling with this (on the grounds that it's unnecessarily complex) for the typical 100sq m, roughly cuboid, property that makes up the va...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice for ground source heat pump in new build with PV and batteries

First question is why do you think you need 18kW? Whats the house construction and where are you? 45W/sq m is high for a modern purpose built house...

3 months ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Tariff and charging strategy advice please

They haven't asked me to prove that I have an EV (I do) but the terms do require that you charge an EV from time to time, so I guess they could if the...

3 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
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RE: Yes, the "zoning with ASHP" topic again...

@heatgeek I do wonder whether in a house with high thermal mass whether some degree of look ahead control would be useful particularly in the seasons...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Warm weather and heat pumps.

Ours is also still on. Heat pump kicks in a bit at night when it's very cold (6C last night) and generally is off all day. The key as mentioned abov...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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