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- Item Backdraft Damper
- Type Roof Mount, Exhaust
- Damper Size (In.) 23 x 23
- Overall Size (In.) 25 x 25
- Flange Width (In.) 1
- Max. Velocity (FPM) 2250
- Construction Material G-90 Galvanized Steel Frame, Aluminum Blades, Stainless Steel Pivot Pins, Nylon Bushings and Galvanized Steel Tie Rods.
- Use w/Dayton Ventilators 4HX85,4HX86,4HX96,4HX97,4HZ56, 4HZ57, 4YC50, 4YC51, 4YC76-77
- Includes Pre-punched Conduit Hole Knock-out and Felted Edges For Quiet Operation
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