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JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Nov 7, 2025
Profile Activity
Topics: 18 / Replies: 3304
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RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

Further to the above here is the system pressure measured by my Vaillant. I know that this reacts to pump head, because (a) its about 0.6bar less tha...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant water pressure gauge vs Analogue gauge

@jeegnesh My heating switched off altogether for three hours today, so the water pump stopped. Whilst it was off, the water pressure on the controlle...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

The output is not, so far as I can tell, limited to 3.8kW when NR is active although I have only limited monitoring capability so could just be wrong....

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: towel radiator, which one?

Possibly 25mm Vs 22 mm pipes. Output depends on surface area principally, but also on form factor. A rad that is twice as tall as another will emit...

8 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Low Loss Headers and Buffer tanks - Your experiences wanted

@toodles Thanks, very helpful.

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

I have a 7kW Vaillant and it definitely has a PWM pump. The 12kW may differ of course. This water pump can, if you wish, be turned up or down manual...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Are MCS are finally improving (some of) their guidelines?

I suppose it achieves what it is designed to achieve, namely to protect installers. Just like everything MCS so far as I can tell. He who pays the ...

8 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
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RE: Low Loss Headers and Buffer tanks - Your experiences wanted

@toodles Thanks for this. I was working on a 'how to fix an LLH/buffer tank without removing it' script and more or less got, in my thought process...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

@declan90 Be aware that this might impact COP negatively as you are aiming to increase the emitter DT. In principle higher emitter DT = lower av...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

I note 21 degrees specifies a 25l buffer tank. I would check, if you haven't already, that this is 2 port not 4 port. I would not accept the proposa...

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

Radiator manufacturers publish the volume of water in their radiators. For any given height and type its proportional to length so they often just gi...

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

Re the Ebac heat pumps The heading on the table is presumably meant to be kW not kWh! - the 9kW one will be cycling almost continuously with a min...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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