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JamesPa
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Oct 20, 2026
Profile Activity
Topics: 28 / Replies: 5524
AllTopicsReplies
Reply
RE: High air source heat pump running costs – Vaillant AroTherm Plus

!C drop across the buffer is small, and might cause an efficiency degradation of ~3%. But 2C flow to return is also small so was this at a time when ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Forum updates, announcements & issues

really? Im not sure if thats encouraging or scary.

2 years ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: buffer/volumizer cupboard space eater, do i need one?

Not sure this is precisely what happens or how the control loop works. What I observe on plots I have seen (including mine) is that the flow temperat...

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

I honestly dont know. I think there were two questions 1. Is 5C somehow critical - answer no 2. Does it matter if you have designed for ~5C ...

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

So this is fairly simple and there is no need for anyone to get prescious about their current position. We all learn by being challenged and hopefull...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Say hello and introduce yourself

Welcome. If you provide some more information about the property and anything you have already found out I'm sure you will get some helpful ideas.

2 years ago
Forum
Introductions, Forum Rules & Updates
Reply
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...

2 years 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?)

2 years 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...

2 years 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

2 years ago
Forum
Domestic Hot Water & Cylinders
Reply
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.

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

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

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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