XX36SHUTWT - Replacement Shutter for 36-inch Cool Attic Whole House Fans

Enjoy a cool and comfortable house once again with our automatic replacement shutter. The shutter's veins run crosswise with a stationary center vein designed to fit over a ceiling joist, so no cutting is required!For use only with Cool Attic 36 in. belt drive whole house fans. This shutter is compatible with fan model CX36BD2SPD. Features: Aluminum construction. 37.5 in. x 34 in. rough opening. No-cut joist installation 95% + closure prevents air backflow Primary Color White Secondary Color None Material Details Aluminum Dimensions 39.25 in. x 35.75 in. (outer); 35 in. x 31.5 in. (inner) Unit Weight 8 lbs. Box Dimensions 3 in. x 40 in. x 37 in.