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Backdraft Damper, Roof Mount, Exhaust, Damper Size (In.) 12 x 12, Overall Size (In.) 14 x 14, Flange Width (In.) 1, Max. Velocity (FPM) 2000, Construction Material G-90 Galvanized Steel Frame, Aluminum Blades, Stainless Steel Pivot Pins, Nylon Bushings and Galvanized Steel Tie Rods. , Use w/Dayton Ventilators 4HZ32, 4HZ33, 4HZ36, 4HZ37, 4YC64-67, 4YC86, Includes Pre-punched Conduit Hole Knock-out and Felted Edges For Quiet OperationSpecification: Item: Backdraft DamperDamper Size (In.): 12 x 12Outside Flange (In.): 14 x 14Construction Material: G-90 Galvanized Steel Frame, Aluminum Blades, Stainless Steel Pivot Pins, Nylon Bushings and Galvanized Steel Tie Rods.Max. Velocity (FPM): 2000Includes: Pre-punched Conduit Hole Knock-out and Felted Edges For Quiet OperationType: Roof Mount, ExhaustFlange Width (In.): 1Use w/Dayton Ventilators: 4HZ32, 4HZ33, 4HZ36, 4HZ37, 4YC64-67, 4YC86Overall Size (In.): 14 x 14
