Backdraft Damper, Wall Mount, Gravity Operated, Single Panel, Damper Size (In.) 20-1/2 X 20-1/2, Overall Size (In.) 22-3/4 X 22-3/4, Flange Width (In.) 1-1/2, Max. Velocity (FPM) 2250, Construction Material 16-gauge Extruded Aluminum Frame, Galvanized Steel Tie Rods and Stainless Steel Hardware, Includes Felted Edges For Quiet Operation
Backdraft Damper, Wall Mount, Gravity Operated, Single Panel, Damper Size (In.) 20-1/2 X 20-1/2, Overall Size...More
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Catalog Page # 4104 (PDF)
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