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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 24, 2025
Profile Activity
Topics: 17 / Replies: 2699
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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...

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

7 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...

7 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...

7 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...

7 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!

7 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...

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

Apologies if you already know this but dont try to get the temperatures right by adjusting the rads, aim to get them approximately the same. That sho...

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

My vaillant does the same, which sounds like a good idea, but the noise it makes is way above any normal noise that this otherwise whisper quiet unit ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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