Position the foam where the flapper comes down on the metal.
Roof exhaust damper.
Aluminum wall vent with screen for air intake (7 inch) (swva 7 ) $40.00.
Exhaust shutters, exhaust louvers, motorized shutter louvers and weather hoods are a typical accessory used when installing an exhaust fan or supply air fan in the wall.
Weather damper & screen features:
It provides a low silhouette and is open on two sides for better air flow.
Leave the drill bit sticking through the roof so you can find the hole.
Whereas the downblast roof exhaust fan does not need the damper due to the bell like housing which keeps all weather out of the building.
Metal roof vent (8 inch) with damper and screen (rdva 8) $55.00 compare add to cart
In this installation video, we show you how to install a back draft damper.
Bottom connection stem option for hard connect applications.
This product is made with heavy 28 gauge galvanized steel.
Foam sealed damper prevents downdraft & ensure energy efficiency screen:
For use on pitched roofs only, if using for dryer venting remove mesh screen.
Roof exhaust vent with damper by luxury metals.
Roof ventilators discharge dirty or contaminated air containing odors, fumes, and grease vapor away from the roof.
The famco bk bathroom fan / kitchen exhaust roof vent is designed for use with bathroom or kitchen exhaust venting systems.
Metal roof vent (7 inch) with damper and screen (rdva 7) $50.00.
Environmental air duct exhaust shall terminate not less than 3 feet (914 mm) from a property line, 10 feet (3048 mm) from a forced air inlet, and 3 feet (914 mm) from openings into the building.
Most roof caps for bath fan exhausts have a light aluminum backdraft damper which rests on a sealant strip, which is basically a foam piece of weatherstripping.