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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Nov 8, 2025
Profile Activity
Topics: 18 / Replies: 3315
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RE: Aira Heat Pump: Stylish Scandinavian Heating

@bromide @mikeh @editor This is interesting indeed. It is undoubtedly the case that buffer tanks can work, the problem is that they are generally t...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

With a well designed system with a tolerably well insulated house that is true, or thereabouts. Not only for efficiency but also for cost. There are...

4 weeks ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Are We Sleepwalking Into Another Race to the Bottom?

That sounds suspiciously like an argument by an installer who just wants to replace cylinders at any cost to the customer, hasn't got a technical argu...

4 weeks ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Say hello and introduce yourself

If you know what you need the maths is straightforward. Assume water in is at 10C and shower water at 40C. The heat capacity of water is 4.2kJ/lC ...

4 weeks ago
Forum
Introductions, Forum Rules & Updates
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RE: Are We Sleepwalking Into Another Race to the Bottom?

It's worth adding that you don't need to disagree to exercise different choices, you may just have different circumstances. If you have loads of ca...

4 weeks ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

So true, possibly with the exception of people you wouldn't want as customers anyway! A clear, honest explanation demonstrates understanding (both o...

4 weeks ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Are We Sleepwalking Into Another Race to the Bottom?

OK so if I read this correctly your main objection is marketing, and particularly the potential perception-shaping effect together, just like me, with...

4 weeks ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Say hello and introduce yourself

or you can add a circulator pump and PHE (instead of the coli) to re-use an existing cylinder with an ASHP in some cases, particularly if you hav...

4 weeks ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: Are We Sleepwalking Into Another Race to the Bottom?

Im know that we relatively rarely disagree, but on this occasion but I do disagree, quite strongly in fact. The 'zero disruption' bit is a piece of...

4 weeks ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Sorry but the document I quoted is a requirement for an MCS installation and specifically specifies different design temperatures for bedroom (where p...

4 weeks ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Midea ASHP – how to set weather compensation

If I were in your shoes I would absolutely want to get an independent handle on loss based on actual measurement given that, from what you have said, ...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

There is some truth and perhaps even relevance in that! It sounds like just the sort of house for which the standard fabric calculation could eas...

4 weeks ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
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