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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Nov 16, 2025
Profile Activity
Topics: 18 / Replies: 3389
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RE: Mitsubishi PUHZ-SW120 ASHP & Buffer Tank

Ok well in that case I defer to the more detailed comment by @johnmo above. There are ways to fix the pump capacity (if it's actually a problem). ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi PUHZ-SW120 ASHP & Buffer Tank

Can you confirm: Does this model actually have an internal pump. Quite a few Mitsubishi models don't.

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Stick to your guns (which I'm sure you will). Buffer tanks are, in most domestic cases, for the benefit of installers not homeowners. That being the...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 6 Red Flags to Avoid When Considering a Heat Pump Installation

ASHPs (and fossil boilers running at a low flow temperature or with weather compensation - rare in UK, common in more enlightened countries) supply at...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: In middle of ASHP installation - a few questions

Wall mounted Aircon units are very common. Many ashps include instructions for wall mounting. Perfectly legit as long as the wall is strong enough a...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP - a few (probably dumb) questions about the lived experience

I have been told over a period of time by several people in the industry that ventilation loss is one of the major uncertainties in the standard sprea...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP - a few (probably dumb) questions about the lived experience

Thanks for that explanation which is very interesting. Btw I'm not advocating homely, just citing it as an example of a technology which (reputedly) ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP - a few (probably dumb) questions about the lived experience

I don't doubt its feasible, however there is extra cost and (physical) volume. Many modern heat pumps are pushing the 0.6cu m permitted development l...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP - a few (probably dumb) questions about the lived experience

You are correct that ToU tarrifs, and more sophisticated tarrifs still, will further complicate the situation and exactly one of the things that Homel...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP - a few (probably dumb) questions about the lived experience

@majordennisbloodnok @davidalgarve @bontwoody @cathoderay @toodles @mikeh (and anyone else I have missed out) thanks for the good natured and producti...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP - a few (probably dumb) questions about the lived experience

Apart from the slur on engineers/physicists (I have a degree in physics and spent the first part of my working life in engineering), I agree with almo...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP - a few (probably dumb) questions about the lived experience

I agree with the first point entirely. As to 'do I have any evidence that money rather than comfort is the primary driver' then I would say yes some...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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