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- Item Backdraft Damper
- Type Roof Mount, Exhaust
- Damper Size (In.) 27 x 27
- Overall Size (In.) 29 x 29
- 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 4HX87, 4HX98, 4YC52, 4YC53, 4YC54, 4YC55
- Includes Pre-punched Conduit Hole Knock-out and Felted Edges For Quiet Operation
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