Aprilaire 5578 Backflow Damper
Outlet Duct Collar + Backflow Damper
Browser Not Supported
You are using Internet Explorer as your browser, which is no longer supported by our website. Because of this, you can view products but not place orders using Internet Explorer on our site.
Please update your browser to any of the modern browsers listed below or use a different internet browser to place an order on this site.