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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 15, 2026
Profile Activity
Topics: 20 / Replies: 3942
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RE: New build installation query

Nice neat plumbing job! I cant see the plant room on the rather low resolution plan. Where is it? Also the key drawing 12327-1000030975 is too lo...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin Octopus installation update - I saw my first defrost. 😍😂

ah - not the greatest routing. Is it possible to insulate and/or isolate the pumps from the structure?

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan R290 10kW performance

Not sure I agree with that. Thermodynamically lower deltaT=higher average emitter temperature for any given flow temperature = lower FT needed at t...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan R290 10kW performance

This looks odd: Heat transferred = F*DT*.0633=18*3*.0633=3.4kWPower consumed = 2.4kW   3.4kW delivered to the house is not unreasonable at ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me keep the faith with my air source heat pump installation

I think there may be some oddities about the COP reported by the app at present and possibly going forward. My app (v3.31 build 24435) no longer se...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me keep the faith with my air source heat pump installation

Is it still cycling, at what FT/OAT? Mine appears currently to be at the 'sour spot'. OAT about 11C, still just cycling, COP 3.9, target FT ~32. I...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Daikin Octopus installation update - I saw my first defrost. 😍😂

Is it possible there is air still trapped in the system. Mine took a month to clear and despite the presence of an auto bleed valve one radiator need...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan R290 10kW performance

I cant remember what Ecodan reports but some heat pumps report energy consumed and environmental gain. In this case cop = energy consumed/(energy co...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: One room is colder than the rest of the house

I would personally be sceptical about reaching any conclusion that goes against the norm of heat pumps. In the end the Cosy is a heat pump, subject t...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus

If you paid for any of the assessments try asking for the full calculation. I did for the one I paid for, very useful.  

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Radiator Question

@drei Thats a nice designer radiator which it would be a shame to bin, and the space is otherwise useless. That said vertical panel radiators dont...

3 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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