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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 13, 2025
Profile Activity
Topics: 17 / Replies: 2685
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RE: Yes, the "zoning with ASHP" topic again...

I agree (that it's overthinking). I think people forget that rooms share heat and houses have significant heat capacity. So in many, perhaps most, ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hydronic plinth heaters and ASHPs

Unless your defrost is already marginal I can't see it making a material difference but of course you could, if you were concerned, do the calculation...

3 months ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Reply
RE: Yes, the "zoning with ASHP" topic again...

@heetgeek There are plenty of new build super insulated houses that run on ashps reported particularly on buildhub. I don't know exactly how th...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hydronic plinth heaters and ASHPs

I have a mitsubishi wall mounted fancoil which is I think essentially the same construction as a plinth heater. No hydronic balancing needed, it modu...

3 months ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
Reply
RE: Yes, the "zoning with ASHP" topic again...

Thanks for all the explanation that's very helpful. In summary I think you are advocating splitting a heating into multiple circuits with separate p...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Or of course not having a buffer at all! Would an installer that wants to fit a buffer unnecessarily because 'thats what we do' or because of warra...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Commencing on an ASHP Installation Process

I think you may very well be right and of course A2A can be used also for cooling (A2W can also in most cases but only if you have ufh or fancoils). ...

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

The guidance associated with the UK building regs require separate control of each room unless it is not efficient so to do. Please explain why...

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

I am really sorry to hear this. I don't know how big your house is but, for comparison and to show that this is not inevitable (and also after learnin...

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

When you say temperature overshoot are you referring to overshoot caused by external factors such as solar gain or cooking, or something else? ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

That all sounds very believable. Presumably mixing of return water with flow water to the emitters (and thus a reduction of ft to emitters) will howe...

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

I'm not sure it's just that tbh. Many, possibly most, Houses respond slowly particularly if the requirement is to reduce in temperature, and rooms sh...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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