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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 26, 2025
Profile Activity
Topics: 17 / Replies: 2699
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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...

6 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...

6 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...

6 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

6 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...

6 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...

6 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...

6 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...

6 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'. ...

6 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: New kitchen with no walls – will fan coil units work?

@adamkis the one I have, there is a smaller one but the size difference is quite small and obviously the fan will have to work harder on the smaller o...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump's integral circulator pump

Interesting Have you got some examples/evidence you can point to. So far my Vaillant 7kW operated 24x7 open zone no buffer tank is working out 13% ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: new kitchen no walls free, will fan coil units work?

I have one Mitsubishi wall mounted fan coil in my otherwise all radiator ASHP system, installed because a passive radiator wouldn't fit. It's in the r...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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