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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 19, 2025
Profile Activity
Topics: 17 / Replies: 2696
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Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Good luck, I hope it all works out!

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Is Your 6kW Air Source Heat Pump Really a 6kW?

In fairness to heat pump manufacturers the output inevitably (unless artificially restricted in software) varies with oat and FT. Furthermore the vari...

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

Thanks for the detailed reply and I apologise if I can sometimes be pedantic and determined to 'get to the bottom' of product claims. My aim is simply...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Really delighted to hear that. I can't comment on homely but if you don't have it then you will likely want to readjust your weather compensation cur...

4 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Plate heat exchanger considerations

Work on 2-3 percent per degree. This is a reasonable estimate of the reduction in COP because you will need to run the heat pump at a higher tempera...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

4 months ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
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...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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) ...

4 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...

4 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...

4 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...

4 months ago
Forum
Grounds Source Heat Pump (GSHPs)
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