Atmosphere’s all new galvanized steel back draft dampers fit directly into the duct simplifying installation. They feature a shaft for each of the 2 flaps so to prevent jamming. Also, the flaps close onto a perimeter gasket ensuring the best air seal and quiet operation
Spring loaded backdraft damper
- Neoprene damper seal minimizes leakage
- Requires from 0.04 to 0.08 inches wg pressure to open
- Simple installation in any position – entire assembly inserts into duct
- Gauge: 20