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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 15, 2025
Profile Activity
Topics: 17 / Replies: 2692
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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)
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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)
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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)
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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)
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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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RE: Help me understand my Mitsubishi Ecodan system

In addition to the above you might want to balance out the buffer so it is acting as if not there. Adjust pump speeds for minimum difference in temp ...

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

It sounds like you get it, maximise the load by opening everything up, cancel mixing by setting the mixer valve temp to max, and then batch heat your ...

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

I'm really sorry to hear that. As others have said this is massively oversized. It is also massively overcomplicated. Taking the two together this...

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

Hi Just to confirm my understanding. You have an 11kW heat pump and an assessed loss of roughly 2.5kW (118W/K * 20). Is this a correct interp...

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

Thanks. Just a few more questions to get a handle on sizing What was the date of the plot and what was the approx OAT then? Which model ASHP...

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

Fundamentally I agree with @mars and yes please post the full system schematic for detailed suggestions. Seriously heat pumps work best when operate...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Thats a brilliant result and you must be pleased you persisted with fighting this. Its also a good example of what I am beginning to suspect (but can...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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