Stop vent clanging with dampers
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Range hood vent system
The vent hood ducts through a rigid or flexible pipe to a cap on the roof or side of your home.
Often a stiff wind will open vent dampers, causing them to periodically clang shut. If the noise drives you crazy, new spring-loaded backdraft dampers ($9 to $30,
depending on the size) should solve the problem.
Measure the diameter of the vent pipe and order the
dampers from a duct supply company (hvacquick.com
source). Start by replacing the backdraft damper directly
above the vent hood. If that doesn't solve the problem, install a
second damper near the wall or roof discharge cap. The second
damper will greatly reduce the clanging problem.