Dayton 20" Backdraft Damper/Wall Shutter
Item Name:Dayton 20" Backdraft Damper/Wall ShutterDescription:Designed to prevent air backflow when the fan is off, this DAYTON backdraft damper/wall shutter is ideal for use with direct- or belt-driven exhaust fans. Model has counterbalanced louvers with felted edges that open easily and seal quietly. Unit has 26-ga. mill-finish aluminum louvers with galvanized steel reinforcement strip and stainless steel rivets. Frame depth: 2-1/2". Model is suitable for general purpose applications. Item: Backdraft Damper / Wall Shutter Fits Fan Dia.: 20" Shutter Overall Size: 25" x 25" Shutter Construction Material: G-90 Galvanized Steel Frame and Tie Rods Shutter Opening Required: 22-1/2" x 22-1/2" Shutter Free Area: 2.519 sq. ft. Shutter Mounting Position: Vertical Shutter Mounting Location: Wall Shutter Item: Backdraft Damper / Wall Shutter Length: 25" Width: 25" Frame Depth: 2-1/2" Open Depth: 5-3/4" Flange Width: 1-1/2" Mounting Hole Size: 9/64" Max. Velocity: 2500 FPM Blade Material: Mill Fi