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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 20, 2025
Profile Activity
Topics: 16 / Replies: 2631
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RE: advice on excessive shortcycling and overall efficiency

I agree with the above Fancoiks have a very small water volume and you have a fairly high capacity heat pump in a mild climate. Short cycling is to ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Share Your Experiences with Heat Pump Manufacturer Support

Sorry I'm still not sure what you are actually observing (what do you see as opposed to what do you think might be the explanation) The heat pump ca...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Boston Lincs based homeowner seeks advice on HP install

Difficult to comment. Given the choice I would design for 45 or less and wouldn't accept anyone who won't. I would reject without question anyone wa...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: buffer/volumizer cupboard space eater, do i need one?

I agree with @toodles. By way of a direct answer to your question, so you have a good reason to reject them and look elsewhere. I adopted the appro...

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

It provides extra system volume which is useful for defrost but may well not be necessary. Have you any idea what volume of water you have in your se...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan consuming 100kwh per day in new build!!!

@anca1808 Just to give you some comfort and set expectations, my Vaillant heat pump is working out 13% cheaper than gas on a like for like basis, over...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Share Your Experiences with Heat Pump Manufacturer Support

Maintain the LWT by adjusting its heat output (if the required power is within its modulation capabilities) This is surely OK. Its adjusting...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Share Your Experiences with Heat Pump Manufacturer Support

Im sorry but I think you are getting confused. The statement above is either not correct or there is something wrong with your system that needs to b...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Fujitsu Waterstage WOYG160LJL Air Source Heat Pump

I cant remember what your WC curve showed, but it should follow that. This is only a few degrees change given that OAT doesnt vary that much Wit...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Share Your Experiences with Heat Pump Manufacturer Support

OK I found the original post about 4.88kW and I also agree with @editor above. Firstly It wont help to operate with the thermostat as opposed to on ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Share Your Experiences with Heat Pump Manufacturer Support

Im sorry to hear about your troubles but its definitely good that the buffer and secondary pump has been removed. You are on the right path, keep the...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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