Backdraft Damper 10 in

Made of galvanized steel. Prevents reverse air flow when fans are shut off. Saves CO2 and prevents odors from flowing backwards. Rubber gasket pre-installed on exterior for an air tight seal.

This backdraft damper will keep the air from your inline fan flowing in the right direction. The damper will stay closed while the fan is off preventing drafts and insects from entering through the duct. As soon as the fan turns on the air will push the damper open to allow the exhaust to escape.