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Air source heat pumps and noise

Mars · 2023-12-09T08:32:14Z

I’m putting together a short video to show how much noise air source heat pumps actually make. If you’d like participate, please download a decibel measuring app to your phone.Here’s a great free one for iPhones. Then record a video of your heat pump using the aforementioned app standing 3-5 metres away. This will show your heat pump in operation with the corresponding dB values. Then simply use wetransfer.com to send me your video to editor@renewableheatinghub.co.uk and be sure to include your make and model.

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Air Source Heat Pumps (ASHPs)

Last Post by newhouse87 1 year ago

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Majordennisbloodnok

(@majordennisbloodnok)

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Posts: 1687

16/05/2024 10:58 am

Posted by: @transparent

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Posted by: @editor

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in rural or garden settings to use as b roll

I could do you a video of these organic heat-pumps.

Ideal for a "bee role"...
They emit a low hum, and never freeze in winter.

-- Attachment is not available --

Yes, but when they go wrong things get really sticky. Definitely a heat source with a sting in the tail....

Sorry, I'll get my coat. Taxi, please.

105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"

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newhouse87

(@newhouse87)

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Posts: 234

19/10/2024 9:10 am

Hi, having lot of vibration from my wall mounted heat pump. In cold weather especially it's as if whole house vibrating. Anything to help this noise as I'm light sleeper. Moving to ground would be very costly I'm told. Are them rubber washers correct or should I have more. Bracket on wall has no rubber.

Thanks for any help.

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Mars

(@editor)

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Posts: 4351

Topic starter 19/10/2024 9:19 am

@newhouse87, first prize would definitely be getting that unit on the ground and detached from the wall. That's probably, as you've identified, what's causing the reverberations when the heat pump kicks in. I'll defer this to some installers that may have some practical advice.

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Tim441

(@tim441)

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Posts: 398

19/10/2024 9:19 am

Does not look ideal!

Simplest way could be to build a base e.g. from blockwork. Mass fill with concrete. Use standard rubber feet etc.

Completely remove from wall. But should be possible to achieve without changing pipework.

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV

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newhouse87

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19/10/2024 9:42 am

Posted by: @editor

↑

@newhouse87, first prize would definitely be getting that unit on the ground and detached from the wall. That's probably, as you've identified, what's causing the reverberations when the heat pump kicks in. I'll defer this to some installers that may have some practical advice.

Had thought about building up to it, that way no need to rewire or plumb. Heard putting more weight on unit could help like few 4 inch blocks.

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newhouse87

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19/10/2024 9:53 am

Posted by: @tim441

↑

Does not look ideal!

Simplest way could be to build a base e.g. from blockwork. Mass fill with concrete. Use standard rubber feet etc.

Completely remove from wall. But should be possible to achieve without changing pipework.

Cheers, yeah that was my nuclear option to build pad up to it. Probably job for next year now.

Was it poor installation?

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Tim441

(@tim441)

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19/10/2024 10:04 am

@newhouse87 I'm not an installer. But looks a strange option. No idea why they went for that? Is there danger of flooding so wanted it off ground? But a base would always seem a better option if wanting it raised - hardly difficult if thought about pre-install especially.

As a matter of interest... how far off the wall is it? Vs installer recommendations? I think generally recommendation is 300mm?

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Mars

(@editor)

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Joined: 5 years ago

Posts: 4351

Topic starter 19/10/2024 10:36 am

Posted by: @newhouse87

↑

Was it poor installation?

We recently touched on this topic in a podcast, and all the installers agreed that they try to avoid mounting heat pumps on building walls for exactly this reason. Ground installation is much more stable and effective. Given that you have the ground space available, it seems strange that they would choose to mount it on the wall.

Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!

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newhouse87

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19/10/2024 11:19 am

Posted by: @tim441

↑

@newhouse87 I'm not an installer. But looks a strange option. No idea why they went for that? Is there danger of flooding so wanted it off ground? But a base would always seem a better option if wanting it raised - hardly difficult if thought about pre-install especially.

As a matter of interest... how far off the wall is it? Vs installer recommendations? I think generally recommendation is 300mm?

Footpaths weren't in when installing so done handy option i think. It's leaning forward too which I don't like. I'm going to add weight to it first to see does it dampen noise. Il check when home distance from wall.

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newhouse87

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Posts: 234

19/10/2024 11:21 am

Posted by: @editor

↑

Posted by: @newhouse87

↑

Was it poor installation?

We recently touched on this topic in a podcast, and all the installers agreed that they try to avoid mounting heat pumps on building walls for exactly this reason. Ground installation is much more stable and effective. Given that you have the ground space available, it seems strange that they would choose to mount it on the wall.

They took easy option, I didn't think about noise at the time. Base up to it il do next year idsay.

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newhouse87

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19/10/2024 12:46 pm

Posted by: @tim441

↑

@newhouse87 I'm not an installer. But looks a strange option. No idea why they went for that? Is there danger of flooding so wanted it off ground? But a base would always seem a better option if wanting it raised - hardly difficult if thought about pre-install especially.

As a matter of interest... how far off the wall is it? Vs installer recommendations? I think generally recommendation is 300mm?

230mm from wall.

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Tim441

(@tim441)

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Posts: 398

19/10/2024 1:01 pm

I'm not sure of your make/model? Might be worth a check of installation instructions.

I assume brackets are official ashp ones? So maybe the heatpump should have been installed as far as possible away from wall which (from looks) would have added 50mm or so?

Possibly a bit nitpicking as maybe makes little difference in reality? But if you end up involving installer it could be added to list!