Should I put a layer of foam, neoprene, or some other material between plywood and studs, or fan and plywood, that may dampen vibrations? If yes, what's a good material to use? Or is this a waste of time because vibration is mainly transmitted through the screws and unless I replace screws with different mounting hardware then it won't solve the problem?.Are there vibration-dampening screws or mounts that are strong enough to hold up a 25 pound fan? And if so, should I use them between fan and plywood, or between plywood and studs? (Note that I'll still need to have an air-tight seal between the fan and plywood, and plywood and studs, to prevent backdrafts.).Is there any particular way I should mount the plywood to the studs that may dampen vibration?.Should I put the mounts on top & bottom or left & right? Or does it not matter? Is there a particular way I should mount the fan to the plywood to reduce vibration? The fan has two pairs of mounting brackets that are asymmetrical: there's a pair of brackets on each side of the fan (each about 3 degrees from each other), not 4 brackets spaced 90 degrees apart.Is mounting to plywood likely to change the vibration characteristics of the fan? Instead, I'll be mounting the fan to a plywood sheet with a fan-sized hole cut in the middle, and mounting that plywood sheet to the studs. I'm preparing to change (based on this answer) from directly mounting the fan to studs.Even when the fan is running at its lowest speed, when the house is quiet I hear a low-pitched hum, even when I'm two floors below the attic. How can I reduce noise and vibration that's transmitted from an an attic gable fan to the rest of the house? Currently, the fan is mounted via screws to studs on the gable.
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