Industrial grade gravity fed back draft damper requires no power and is standard with all CentricAir whole house fans. The gravity damper is designed keep attic air from entering the living space when the whole house fan is not in use.

A Whole House Fan Company
Industrial grade gravity fed back draft damper requires no power and is standard with all CentricAir whole house fans. The gravity damper is designed keep attic air from entering the living space when the whole house fan is not in use.