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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 16, 2025
Profile Activity
Topics: 16 / Replies: 2626
AllTopicsReplies
Reply
RE: Optimising DHW in summer (once heating season ends)

Unless you use negligible hot water the energy used by the compressor will dominate, the water pump will be negligible. So you should optimise for th...

5 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Say hello and introduce yourself

Welcome to the forum and please feel free to ask as many questions as you need to, no question is 'stupid'. If you havent already can I suggest you r...

5 months ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: What is the maximum output of the Vaillant 7kW Arotherm Plus

There is a table here showing figures generally well above 7kW /p> However there has been recent speculation that these figures are gross output and...

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

I am not sure what assumptions you think I am making in my analysis of what we know so far about whether there is anything 'magic' about a 5C DT flow-...

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

Or someone is watching the woke in preparation for the right wing takeover to come.

5 months ago
Forum
Introductions, Forum Rules & Updates
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 ...

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

really? Im not sure if thats encouraging or scary.

5 months 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...

5 months 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 ...

5 months 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...

5 months 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.

5 months 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...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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