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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 25, 2025
Profile Activity
Topics: 17 / Replies: 2699
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RE: advice on excessive shortcycling and overall efficiency

If it is in series (ie both ports connected to the flow not one to the flow and one to the return) I cant see why not. Its not really like another em...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: advice on excessive shortcycling and overall efficiency

Some further thinking on where to connect the buffer is emerging on this thread/p> The key take away is to put it beyond the DHW/Space heating diver...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

I think the argument for the return is to avoid any chance that it reduces flow temperature and thus compromises efficiency. But it shouldn't if well...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Heat pump's integral circulator pump

SOFAIK it doesn't have to. My understanding is that there is nothing magic about 5C, its just a sensible design value in most domestic situations so ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

I cant believe I didnt do something similar at some time with your data. Looking back I did, this is 19/9/23-3/12/23, the units will be degree-minute...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

Potentially a significant finding though since the expectation from the physics is that energy use is proportional to the difference. However are the...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

I think @cathoderay is correct and it goes even further (unfortunately). Robust empirical evidence (from which we might draw general as opposed to sp...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

Thanks for raising this and more particularly enumerating the options in a way that I havent previously seen. It may take a few circuits of the buoy ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: efficiency factor of heat pump brands

I dont doubt you are right. That said I did some calculations a few days ago of the ratio (for a Vaillant heat pump) between the theoretical max...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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