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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 23, 2025
Profile Activity
Topics: 17 / Replies: 2699
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RE: Yes, the "zoning with ASHP" topic again...

@Judith, @ccap The control problem is not actually as simple as it might seem, even in 2025! There is a whole branch of engineering ('control theor...

4 months 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

@fillib It would be very interesting indeed to determine your actual house loss by plotting ASHP heat delivered vs OAT (eg on a daily basis). I look...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

Yes exactly that. The UI presents it as adjusting the target room temperature. What it actually does is shift the WC curve (whether or not room infl...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

There are a couple of general points to make here. Contrary to what the manufacturers of heating control systems would like us to believe: Lots ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: volumizer question.

What's the problem you are trying to solve. The answer may be both, tell us more about your system, your house, and what problem you think you have

4 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

Good luck. For what it is worth my system was very definitely an upgrade to my heating. Both DHW and space heating are now far superior to what I ha...

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

Here are the performance curves for the 3 and 5kW machines. Sorry they are in Czech, these tables dont seem to appear on the UK website. Note that ...

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

Here is an analysis of the rads proposed excluding the bathroom where Im not sure what is actually being suggested. The big differences, in favour of...

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

@eliuccio I think what you are seeing is the variation is loss estimates. It happens, they are estimates, making different assumptions any of whic...

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

@eliuccio Thorough analysis and, tbh, it looks like you have two viable quotes (a good position even if it makes the choice difficult!) Here ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

Cynically I would suggest its there to protect the installer and cost you money unnecessarily (both at install time and in running costs). The smar...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me understand my Mitsubishi Ecodan system

Yes Yes to the first No to the second (I think) as this results in cold return water being swept up into the flow, reducing the flow temp to em...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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