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JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Jul 23, 2025
Profile Activity
Topics: 16 / Replies: 2632
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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...

4 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.

4 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

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...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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 ...

4 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...

4 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...

4 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

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...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: (How) does your heat pump control its water pump?

Thanks, thats helpful And painting the outside black... The UI for many makes has not, IMHO, been designed or developed with the user in mind. ...

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

OK so assuming a base temperature of 15.5, -2 will be 17.5 degree days. So your heat loss at -2 is roughly 3.5*17.5/24=2.6kW which is consistent with...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

OK, further to the above (which please do read as its about a different and possibly equally important topic) this plot is a bit of a goldmine! ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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