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Heating and cooling: ASHP; noisy?

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    • CommentAuthorRex
    • CommentTimeJan 16th 2009 edited
     
    Hi there,

    I have had a spanner thrown in the solar works by the possibility of installing an ASHP running on E18 (apparently.)

    But how noisy is an ASHP? It would be positioned where we are unlikely to hear it, but I think if may disturb the neighbour..

    Rex
    • CommentAuthorleilei
    • CommentTimeJan 16th 2009
     
    I think different models have different noise level, say the noise of a 5 kw unit must be lower than that of a 10 kw unit,
    the ASHP we made is less than 48 db ( measured at a distance of 3 meters away from the outdoor unit )
    hope this helps.
    • CommentAuthortony
    • CommentTimeJan 16th 2009
     
    about the same as an air con outdoor fan box thingy
    • CommentAuthorSimonH
    • CommentTimeJan 16th 2009
     
    How noisy is noisy? I think you need to stand next to these things, then inside with the window open / closed.

    The pool we had in Florida (I know not a very green holiday) had a heat pump and the noise was terrible. Not just the level, but the type of noise. Think of a mains powered electric drill on slow crawl speed. Not a hum, more of a square wave styled hacking sound.

    Still, we currently put up with a bubbling gurgling, whirring gas boiler and pump. However - the sound is less "in your brain" and more "in the airing cupboard".

    All that said - I think some are quiet. Take care to see whatever you buy in operation first! When it's on full pelt, on a cold day.

    Simon
    • CommentAuthorjezza22
    • CommentTimeJan 16th 2009
     
    Rex, I've got a newly installed air-to-air ASHP. It's a poweful unit rated at 8.10kW in heating mode. The outdoor unit is rated at 52dB for noise level. Given that it is the outdoor unit that is sized on power the sound level (and physical size) will be less with a less powerful unit. I was a little concerned about horror stories such as the 'drill' above but I was reasured by the installers that I woud not hear it even though it is bolted on brackets hanging directly off my study wall where I tend to work each day.

    I cannot hear the outdoor unit at all when sat in my study and I have to walk to within a couple of metres to hear the unit outside of the house. If you turn up the heat settings it will get louder and quieter if you turn them down. I've yet to hear it at all unless I'm stood next to it outside. My neighbour hasnt even mentioned it and I'm sure he would if he had heard it. When you get close to it it sounds just like one of those fans on your desk in the summer.

    You can hear the indoor unit when it is first getting the room up to tempurature but after that it is so quiet (32dB) that we never notice it.

    Hope that helps.
    • CommentAuthorDantenz
    • CommentTimeJan 16th 2009
     
    The ones I have heard (from a household name in power tools/white goods manufacturer) are very quiet. Quieter than an oil or gas boiler flue outlet anyway.
    • CommentAuthorMarkK
    • CommentTimeJan 17th 2009
     
    Posted By: RexHi there,

    I have had a spanner thrown in the solar works by the possibility of installing an ASHP running on E18 (apparently.)

    But how noisy is an ASHP? It would be positioned where we are unlikely to hear it, but I think if may disturb the neighbour..

    Rex


    they are noisy. You need to locate it so it doesn't disturb your neighbour or your family (i know of one development where the family had an ASBO served because of the noise). You can get internal ashps, ducted for intake and exhaust.

    Post your heat load, then we can offer some db levels

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