This 8-inch back draft damper by Atmosphere® is manufactured with galvanized steel and can be mounted directly in the ventilation duct to ease the installation. The two blades are opened by a spiral spring to prevent any malfunction. Furthermore, the dampers come with a gasket to insure a quiet and sealed operation.
- Neoprene damper seal minimizes leakage
- Requires from 0,04 to 0,08 inches wg pressure to open
- Simple installation in any position - entire assambly inserts into duct