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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 11, 2025
Profile Activity
Topics: 17 / Replies: 2823
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Reply
RE: 4 port buffer tank connections

All fair enough. I dont think I can really add much more beyond what I've already said. if somehow you need to accommodate it switching itself on at...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

All heat pumps cycle, in fact the 'non-cycling' temperature window is quite small even if the heat pump is perfectly matched to the house. Because th...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

Well this is an interesting line of thought and I wonder where MCS would sit (on the fence? as far away as possible?) If manufacturer insists on a b...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

OK thats definitely a different problem. The buffer will presumably cool down fairly quickly in relation to 12 hrs and at that point I imagine that ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

The plot you posted was more like 80% duty cycle, unless you also increase flow temperature (compromising efficiency) then you cant, at the outdoor te...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

Nice one!

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

Just thinking about this measuring the temperatures on all 4 ports should, I think, provide enough information to achieve a reasonable balance. Some...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

The defrost energy has to come from somewhere, ultimately from the heat pump! Just to be clear I have neither a buffer nor a volumiser in my system ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

If they did in the past but dont now then there are at least three contractual questions that arise 1. If they insisted on a buffer as a condition o...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

I would support that sentiment. One conventional way as I mentioned earlier is sensors at one third and two thirds up the vessel. However buffer...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

Do they? That's not what I observe from the several manuals I have read (albeit in some cases fairly quickly, I admit) over the past 2 years. I wond...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
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