heating duct vibrations

Old 02-25-03, 08:50 AM
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heating duct vibrations

my heating system is in the attic hanging from roof rafters.there is a vibration damper on the supply side of the heating system.installing a vibration damper on the return side will it quit the noise. retun is a 8x12 duct with 8" round duct coming off of it to a different room
Old 02-26-03, 03:49 AM
Join Date: Nov 2002
Location: Massachusetts
Posts: 1,856
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A flexible collar is used on both the return and supply to make a mechanical break so that vibration from the unit isn't transfered to the ductwwork. Any hard contact points should also be isolated such as the hangers of threaded rods to hand the unit from the rafters, A rubber connector can be used to beak that attachment. Much of the vibration is eliminated using flex duct .

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