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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 17, 2025
Profile Activity
Topics: 17 / Replies: 2861
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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.

12 months 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...

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

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

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

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

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

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

12 months 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...

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

12 months 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...

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

@bontwoody In truth it is a very widely held misconception, whether we are talking about boilers or heat pumps, that turning off the heating for (sa...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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