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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 12, 2025
Profile Activity
Topics: 17 / Replies: 2836
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RE: How do the settings on my Gen 5 Samsung ASHP sound?

Difficult to say without more information about the house however, for comparison, my 200sq m 1930s house with a mish mash of fabric upgrades (includi...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm ASHP gets noisier when it gets colder outside

Quite possibly. As I mentioned above the 'ideal' product seems only to be available in the EU. There is a UK product which looks like grass, (and th...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Best temperature wave form for best economy and efficiency .

In general lower FT = higher efficiency. These are only 1C apart however and with different outdoor temps, but perhaps more importantly both have ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP and how it should run and potential kw consumption?

Consumption is not that much different to mine when it was very cold. You wont be getting a COP of 4 when its -3~-5 outside, more like 3 or possibly ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is it crucial to get flow temperatures with heat pumps right?

The bodies of TRVs usually have an arrow on them. If it can operate bidirectionally it will be a bidirectional arrow!

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Arotherm ASHP gets noisier when it gets colder outside

Thanks for the suggestion. This appears to have a solid shiny surface and be designed to reduce transmission. I think what I need to do in my s...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Arotherm ASHP gets noisier when it gets colder outside

My 7kW Arotherm does the same. Its especially noticeable during recovery from defrost, when the compressor is going at 100%, and at this point its ha...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is My Midea Heat Pump Inherently Defective?

Sadly I think you are right, until someone develops a cost effective no-frost coating which can be applied and prevents (or reduces) condensation buil...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is it crucial to get flow temperatures with heat pumps right?

... in theory! If they are all (close to ) perfectly sized then adjusting setting them up for consistent deltaT across the radiator is another way t...

8 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

I too have been thinking about this, not least because the only disappointment with my heat pump is that its noisy when recovering from defrost. I t...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is it crucial to get flow temperatures with heat pumps right?

I mean the room. I'm assuming that there is spread in radiator sizing in reality!

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Is it crucial to get flow temperatures with heat pumps right?

Perhaps I didn't make myself clear. Let's make up a scenario and see if we can do better. Suppose you want all rooms at 20C. Your rads are success...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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