Noisy Gravity grille replacement

Discussion in 'Building' started by MaDMaX**, 10 May 2020.

  1. MaDMaX**

    MaDMaX**

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    so on our new build we have 3 of these grille on the kitchen outside wall, one is for the kitchen extractor the others for other extractors,

    [​IMG]

    the problem is when its windy they clater! which wakes our doggies in the night,

    anyone replaced these with quieter alternatives ?

    doing a bit of research suggests an alternative is to fit an open vent and one of these Backdraught Flaps

    [​IMG]

    however im not sure how confident i feel getting into the vents to fit it,

    any/all advice appreciated
     
  2. ^woody^

    ^woody^

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    Fit a cowl/hood.

    Those shutters can get greased up over time when used in kitchens, and can be difficult to fit anyway unless you can access the duct - these perform better towards the fan end of the duct, not near the outlet.
     
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  4. MaDMaX**

    MaDMaX**

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    you mean like one of these

    [​IMG]
     
  5. ^woody^

    ^woody^

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    That's the type.

    Some are just a hood for use with an existing vent cover, and some are a replacement and have a built in draught flap - which could potentially create the same problem.
     
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  7. oldbutnotdead

    oldbutnotdead

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    Those backdraught flaps also rattle and they are not tolerant of any out of roundness on the duct (so, for instance, where one has stitch drilled a bit tight and had to use excessive force to get the duct into the wall :( )
    If your fans are all inline items have a look for replacements with diaphragm electric shutters- yes they're expensive and you have to clean them fairly regularly but they do a much better job of draught control
     
  8. DIYnot Local

    DIYnot Local

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