ericm
Well-known member
My new house has a stove vent hood with that uses 8" ducts. Where it exits the wall the exhaust duct has one of those hooded vents with a damper in it. When the wind blows, the damper opens and then bangs shut. It's a plain sheet metal damper and does not have a spring. It's loud and annoying. It sounds like someone dropping an aluminum ladder.
What I think is happening is that the exhaust vent is in the lee of part of the house. A gust of wind creates a lower pressure and air flows from the house out the vent. Then the gust stops, the air flow stops, and the valve bangs shut.
I'm going to have the contractor that installed it come out and fix it. What's the best way? Replacing the damper with one that's spring loaded or rubber coated or both would require painting the new damper to match the house.
The make up air for the vent hood has an electrically controlled valve. (which is not plugged in, I will have them address that too). Would installing a similar valve in the exhaust eliminate the noise?
What I think is happening is that the exhaust vent is in the lee of part of the house. A gust of wind creates a lower pressure and air flows from the house out the vent. Then the gust stops, the air flow stops, and the valve bangs shut.
I'm going to have the contractor that installed it come out and fix it. What's the best way? Replacing the damper with one that's spring loaded or rubber coated or both would require painting the new damper to match the house.
The make up air for the vent hood has an electrically controlled valve. (which is not plugged in, I will have them address that too). Would installing a similar valve in the exhaust eliminate the noise?