Our New Sealed Cast Iron dampers substantially prevent air from escaping the chimney while also preventing outside air from entering the home. This damper utilizes a high temperature fiberglass gasket to form a tight seal, offering energy efficiency for masonry fireplaces without the use of glass doors or chimney top dampers.
This model was designed to fit into the Standard 36" or 42" and the Magnaum 36" or 42" Fireplaces.