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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: May 18, 2026
Profile Activity
Topics: 24 / Replies: 4845
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Reply
RE: Volumiser required on Grant R290?

Minimum system volumes are normally enough to cover defrost, which is critical. However a larger system volume may improve performance when the heat ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is my Samsung gen6 outside air temp sensor missing a sheath/sleeve?

You wont need one in heaven either which, at least according to the calculation originally published in Applied Optics, is hotter than hell (this has...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: R290 Heat Pump and Foundation Air Bricks

Can you provide a reference please for that statement. Nowhere can I see this within the actual regulations and neither can I find the work 'manufact...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump not reaching flow temperature

Agree, the figure is given for SCOP not COP  

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

Thats very unlikely to be anything to do with the heat pump, the water system is essentially completely separate. Changes may have been made to the w...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@bigfish Sorry to hear that. I would suggest the first step is to get the installer back (preferably before you pay) to look at the noise. Antivib...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: R290 and Foundation Air Bricks

@editor Whilst you are contacting installers you may also ask about R290 heat pumps below windows. My reading of the diagrams from several manufac...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump not reaching flow temperature

The good news is that it leaves no excuse if it doesn't do that! The WC stuff is absolutely basic. I cant understand how an installer doesn't know ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Setback savings - fact or fiction?

... and therein lies the problem. This is probably nearly as difficult as setback. The physics is simple, the engineering and measurement less so!

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Recommended home battery inverters + regulatory matters - help requested

  Thanks. Thats pretty much my intended route if I do go ahead - still dependent on wife's view and electrician's quote. You have been very h...

4 months ago
Forum
Energy Storage
Reply
RE: Setback savings - fact or fiction?

Area under graph is indeed a valid approach and the one I would use, the challenge is 'where do you draw the reference line'. The latent heat of fusi...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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