Product Description

Replacement damper assembly includes handle. This is a steel damper that is designed to be installed inside your 6 inch round bypass duct. It requires a 1/4 inch hole be pierced through the duct so that the hinge end of the damper goes through one side of the duct and the handle end of the damper goes through the other end of the duct. Designed for older Aprilaire bypass humidifiers that do NOT have a built in damper assembly.

The manufacturer is sometimes referred to as April Aire, Aprilair, April Air but is correctly spelled Aprilaire.