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I had a Panasonic bath fan installed the week before Thanksgiving. It was represented that this fan was virtually silent. It is however, noisier than the 22-year old fan it replaced. My contractor tells me that the problem is that the vent exiting the fan is vented by a 3" (too small) flexible hose that travels into the ceiling and ties into a larger duct that isn't reachable. Panasonic fans are at their best when they have a 4" vent hose that travels with a minimum of bends for a total length of 20 feet. Any conditions other than that and they get noisier. It was louder than normal when we installed it. We could only reduce the noise by changing the size of the existing hose to 4” and running that all the way to the central air duct for all the units wherever that is. Maybe Mario (building superintendent) knows. This would entail taking down the ceiling. Is there any other solution? Is there another panasonic fan that fits the smaller size vent? This was very expensive with the installation, and I cannot stand the noise.

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  • babala Dec 19, 2008

    Babala says this is a vibration noise. Electrician is suggesting motor replacement with a motor that has a lower sone rating.

  • Danny Clark
    Danny Clark May 11, 2010

    What kind of noise is it? Wind noise only?

    Or is it more of a vibration and motor type noise?

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  • 334 Answers

Vibration noise is usually due to inballanced, or damaged fan blade.

Take off the coveer, make sure its installed properly, the blade is not cracked, and check for ballanced motor/bracket/blade.

They typically have rubber bushings between the motor mounts and the housing to dampen vibration noise.

Posted on Dec 19, 2008

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