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HarryRea
@harryrea
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Joined: Apr 30, 2025
Last seen: May 14, 2025
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Topics: 0 / Replies: 18
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RE: Yes, the "zoning with ASHP" topic again...

James, thanks again for your thoughtful and persistent questioning — this kind of interrogation helps clarify the strengths and limits of any approach...

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

Hi James,Thanks again for your detailed thoughts. I appreciate how precisely you're interrogating the claims and looking for practical value — so here...

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

@johnmo That’s a clever use of defrost behaviour to guide handover — and it sounds like you’ve fine-tuned it well for your setup. Just for reference, ...

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

@johnmo, I can see what you mean by the heat pump switching over and back between cooling and DHW, but I was referring to the heating season when you ...

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

@jamespa, following on from your examples — here's how I’d approach each:---a) 100 m² New Build (3kW @ -2°C, typical spec):In this case, structural zo...

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

That’s a great question, James, and it goes right to the heart of what sets structural zoning apart from conventional approaches like LLHs or buffer t...

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

@jamespa I want to clarify that my hybrid example was posted specifically in response to Johnmo’s system description. I would not recommend it univer...

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

@johnmo Thanks for sharing the full schematic, Johnmo. That’s a helpful layout, and it shows just how much manual logic and layout planning are neede...

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

@johnmo Thanks, I appreciate your detailed walkthrough. It’s always helpful to see how experienced users approach hybrid setup challenges. I agree ...

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

@johnmo Thanks, Johnmo — fair points as always. I agree that unnecessary complexity has plagued many modern heating setups, mainly where buffers ...

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

@heatgeek Thanks for your post and for articulating a very real scenario that reflects the kind of system we’ll be seeing a lot more of: low flow rate...

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

Thanks, James — that’s a really encouraging and fair response, and I appreciate the open-minded way you've approached it.Yes, you’ve summarised it wel...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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