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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 10, 2025
Profile Activity
Topics: 17 / Replies: 2822
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Reply
RE: Not a good January? My heat pump used 840 KWh of electricity

Apologies, I thought you were complaining about the comparison between the two months. My figures on the temperature differences were for Birmingham ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

If only others took the same approach we would see far, far fewer posts on this forum (and others) complaining about poor performance, and indeed far ...

7 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: 4 port buffer tank connections

100% agreed, I am a firm believer in the liberal use of occams razor!. I was just saying it (balancing a buffer) can be done, although it seems, judg...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

... particularly if you have TRVs and zone valves randomly switching on and off, which may well have been part of the 'justification' for the buffer t...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Not a good January? My heat pump used 840 KWh of electricity

1022kWh here, 200sq m detached 1930s property with piecemeal fabric improvements, loss ~7kW @-2. Figure is from the (Vaillant) heat pump itself not i...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Not a good January? My heat pump used 840 KWh of electricity

You don't say where you are, but I checked the climate for January in central England Jan 2024 vs Jan 2025. Jan 2025 was significantly (16%) colder...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Just one room not reaching desired temperature

designer is talking rubbish. See page 14 of this document It sounds like its moving in the right direction. TRVs may not have the same effect ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Antifreeze corrosive to copper pipe rubber rings?

Just use antifreeze valves instead of glycol, then there cant be an issue.

7 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Just one room not reaching desired temperature

MCS spec for bedrooms is actually 18C. Its quite difficult for an installer to balance radiators properly because it takes a long time. If you post...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Say hello and introduce yourself

Glad to hear that you are pleased with the heating of your house and generally happy. It may well be that there is scope for a bit of optimisation of...

7 months ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Similar really, rads 5C lower than output of ASHP = 10-15% penalty. Difference of 2C on the return possibly a measurement error. I think @toodles mig...

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