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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Nov 15, 2025
Profile Activity
Topics: 18 / Replies: 3377
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RE: Shutting down heating when out for the day - data

I'm always somewhat cautious when claims are made of 30% saving in energy use by turning off/down the heating for part of the day. I'm not for a mome...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New heat pump (Vaillant Arotherm + 7kW) performing better than installers expected?

Heat loss surveys are at best a reasonable estimate and at worst total nonsense. Although the science on which they are based is sound, there are too ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

This a matter of law not an MCS decision or even guidance. End of unless you want to apply for planning permission. You mention it's a Va...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: LG Therma V outdoor temp sensor

The sensor should really be outside in the shade, not inside the unit or in sun. Assuming it's separate (some ashps only have sensors in the air inta...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

@crimson In answer to the question no, unless the lockshield is behaving oddly which will wouldn't rule out. Does turning it back up reduce the te...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Check whether by 'buffer' they mean 2port volumiser (the key feature being 2 port). That's ok. It's typically 20-50l.. Vaillant do put a volumiser ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Business case for a battery?

That's fair I agree this is too crude. It needs to be done properly or not at all. There are at least four companies developing various smart c...

1 year ago
Forum
Energy Storage
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RE: Business case for a battery?

I think most of your criticism of the denz proposal makes sense to me although I can see why turning off heat pumps is attractive. Houses are large s...

1 year ago
Forum
Energy Storage
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

The Grant R290s (if thats what you have) may just be Midea based. If so then you could contact Adia (see my post above). They are looking for test s...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant 13kW Aerona3 - issues getting zones to temp

I think that's a fundamental limitation with weather compensation, and probably why we didn't adopt it (unlike many other countries). Balancing radia...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installations in Flats

Permissions and access are the issues. Planning permission will be needed unless it's the first on the building or within the curtilage and ir meets ...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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