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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 17, 2025
Profile Activity
Topics: 16 / Replies: 2627
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RE: Heat pump's integral circulator pump

Thanks for the clarification. I am also neither an installer nor a heat pump designer! Just an enthusiastic homeowner with a background in physics a...

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

Ok thanks. Why is 8C ideal (and why is 2C a problem?)

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: rad size and efficiency

Adia Thermal sort of advocate this approach and produce some hardware to aid the determination. In many cases however it will be obvious that an upg...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Digital Showers and lower temperature hot water

Thanks, its actually @ianmk13 that has the need so tagging him so he sees your post

5 months ago
Forum
Domestic Hot Water & Cylinders
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RE: Digital Showers and lower temperature hot water

Fair enough. With poor mains pressure the only advantage of a UVC is that it is sealed and so less likely to get general detritus in.

5 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: efficiency factor of heat pump brands

Interesting. COP of only 1 though for the reclaimed heat!

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

It certainly is with mine (Vaillant). The source of the defrost energy is basically the water in the system and during defrost the heat pump extract...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant 7kw vs Samsung 8kw gen7

75C for the Vaillant. This is principally a function of the refrigerant and most if not all R290 heat pumps will do 70-75. You wouldn't want to oper...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Digital Showers and lower temperature hot water

Coil probably not large enough, although this can be overcome by 'plate loading' ie fitting a phe and pump to replace or supplement the coil. I deba...

5 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Vaillant 7kw vs Samsung 8kw gen7

I have the Vaillant. Pros: Compact Excellent and very flexible controller, much more so than Samsung appears to offer. Definitely no need for e...

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

I agree. I agree (how could I disagree!) and its the basis of any of my arguments and the occasional attempt at simulation.

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

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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