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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 27, 2025
Profile Activity
Topics: 17 / Replies: 2706
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RE: Fujitsu Waterstage WOYG160LJL Air Source Heat Pump

You clearly have 'got' it. You dont really need me! The only thing Im not sure about is this "then reduce the temp set point on the ASHP down fro...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Twin 10kw Grant Aerona Volumiser Tanks using lots of power

I apologies for my reaction. I was initially shocked that anyone would do this and then shocked that anyone makes it into a product. I still am TBH...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Twin 10kw Grant Aerona Volumiser Tanks using lots of power

Am I correct in interpreting the photo as showing the volumisers outside and uninsulated. If so that's dreadful, to the point that this needs to be f...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Of course I know that. I am making the implicit assumption that the objective is that this equals the loss from the house. If it doesn't then the ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I completely understand and agree with most of that. The only point I would clarify is your statement 'So there are other reasons for getting capacit...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Twin 10kw Grant Aerona Volumiser Tanks using lots of power

Welcome to the forum and feel free to ask questions. Can you tell us more about the 'volumisers' including ideally a system diagram and a photo. Wh...

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

OK Thats actually quite a lot to go on. My first observation is that the heat pump has way too much capacity for your house. You didnt give the flo...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Im dont recall saying " if you want air to air heating, use fan coils, not radiators." but if I did then apologies! The deviation of the 'ideal' WC ...

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

Welcome to the forum and please feel free to ask any question you wish. There are plenty of people here who are willing to help if they can. Tha...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Nice!

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@sunandair @robs Makes a lot of sense to me. I wonder how much adding a second fixed output compressor adds to cost, I would guess very little.

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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