These newly developed back draft dampers (BDD) are manufactured with quality
components and precision engineering. The back draft damper is used to
prevent air from flowing through the fan (powered off) allowing
contaminated air to escape the room. 5 models to choose from BDD100 4'',
BDD150 6'', BDD 200 8'', BDD 250 10'' and BDD300 12''.
Features:
- Neoprene damper seal minimizes leakage
- 20 gauge steel housing, aluminum spring loaded butterfly damper blades
- Gasket designed to withstand temperatures from -22 F to 180 F
- Simple installation in any position - entire assembly inserts into duct
- Exterior foam gasket assures a tight seal against duct
- All model include stamped metal sleeve with center pin design