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My kitchen vent is a 6" duct that curves to the side, goes to the outside wall, where a fan is mounted, pulling the air outside. Due to the curve (and the fan, I think), when I turn on the fan, it sounds like a jet engine is taking off... both due to "air whooshing" around the bend and the noise of the fan itself.

Is there anything I can do to reduce the noise? Specifically I'm curious if there is any lining I can use in the vent, or a cover that muffles the sound a bit. Or maybe a quieter fan?

duct

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    You can add insulation but first I would ask what kind of duct? If flex change to smooth ridgid and insulate will quiet things down for exhaust fan I have found the quiet ones don’t stay that way once some grease builds up on them.
    – Ed Beal
    Commented Mar 25, 2022 at 19:33
  • I've added a photo. I'm not sure what types of ducts there are, but mine does curve
    – Justin
    Commented Mar 25, 2022 at 19:41
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    That is ridgid, is the back draft damper (flap opening) sometimes they get sticky with grease and when the fan can’t push any air they spin up really fast because the load on the fan is moving the air.
    – Ed Beal
    Commented Mar 25, 2022 at 19:48
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    Try removing the fan, lubricating the motor and cleaning the blade.
    – Gil
    Commented Mar 25, 2022 at 20:15
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    While you have it out, you might see if you can find a quieter replacement fan. It looks like the fan may have been in service for quite a while. There may be more quiet, more efficient models available cheap.
    – gnicko
    Commented Mar 26, 2022 at 1:09

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