3550 Series - Vertical Mount Backdraft Damper-72X8
Standard Features
- Dampers are opened by air pressure differential and closed by gravity
- 16 gauge channel frame
- Galvanized blades are 26 gauge and vee stiffened for extra strength and stability
- Out of airstream linkage
- Single blades on dampers with a height of 10" or less
- Blades run parallel to first dimension given
- Square steel pivot pins in nylon bushings
- Foam tape sealed blade edges to dampen noise
- Adjustable counter balance arms mounted to center of blades. Adjustable weights can be positioned along arm for various opening pressures. (Available only on dampers with multiple blades.)
- Minimum size 6"x6"
- Maximum size 48"x48"
- Fractional and exact sizes available
- Note: Order Wide x High
- Galvanized Finish