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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 22, 2025
Profile Activity
Topics: 17 / Replies: 2698
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Reply
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...

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

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

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

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

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

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

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is your gut better than Math

The Mitsubishi R29O pump has 2 compressors to achieve exactly that. Sofaik the only domestic one so far to do this

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

@anca1808 Lots of ideas above about what could be causing your issues. Nobody, including me, can be definitive because we don't have your system in...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Compute heat loss from energy used

I concur in principle with @old_scientist however there are some points to consider 1. your house has a heat input other than the heating, due to wa...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is your gut better than Math

Its good to hear that you are pleased with the outcome. I agree with @old_scientist that cycling is to be expected (and is unavoidable) in milder tem...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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