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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 21, 2025
Profile Activity
Topics: 16 / Replies: 2631
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RE: How can we prevent our LG heat pump from freezing up in cold weather?

It sounds like it has insufficient system volume for the defrost (energy for the defrost comes from the hot water in the system). This problem is sol...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My house is too big and the Vaillant 7kW heat pump can't heat it when temperatures drop below 4C

@skidoc I dont think there is a particular reason to argue for a split system and it would almost certainly require planning permission. Its also un...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP install contract and BUS grant money

Mine did that also, I wouldn't be surprised if its common/written into the MCS contract template. You get about 3 emails from the BUS people either ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My house is too big and the Vaillant 7kW heat pump can't heat it when temperatures drop below 4C

Sorry to hear that. I have the 7kW Vaillant and, apart from an unfortunate increase in noise when its defrosting, its been excellent. Of course if th...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Compute heat loss from energy used

Quite possibly not, unfortunately. Houses have a significant heat capacity (thermal mass) which means that measurements over short periods of time c...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How can we prevent our LG heat pump from freezing up in cold weather?

Hi Welcome to the forum. Please feel free to ask any questions. In order to help can you give a bit more detail about how it locks up, what is ha...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New kitchen with no walls – will fan coil units work?

What power do you need at what FT? will thio one do/p> otherwise it looks like a kickspace heater is what you need

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

Thats better insulated than my 1930s house of about the same size, apart from the loft which is easily and cheaply upgraded (so I would recommend doin...

5 months ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: DHW Efficiency

You need an extra pump that pumps the water from the DHW tank through the heat exchanger which is external to the DHW tank. The other side of the PGE...

5 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Say hello and introduce yourself

I look forward to the further info and will do my best to help. The thing about heating is that the physics is extremely simple indeed but the a...

5 months ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: solar gain in south rooms best approach?

Thats definitely one option. I also have south facing rooms. One, our main living room has a fan radiator which modulates its fan down and eventual...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: DHW Efficiency

PHE plus UVC direct cylinder (no coil) plus pump is cheaper than most heat pump cylinders. However its 'different' and people dont like 'different'. ...

5 months ago
Forum
Domestic Hot Water & Cylinders
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