16 in Backdraft Damper / Wall Shutter, 16-1/2 in x 16-1/2 in

Shutter Mounting Position: Vertical Shutter Construction Material: G-90 Galvanized Steel Frame and Tie Rods Shutter Free Area: 1.443 sq ft Shutter Opening Required: 16-1/2 in x 16-1/2 in Shutter Overall Size: 19 in x 19 in Fits Fan Dia.: 16 in Blade Material: Mill Finish Aluminum Max. Velocity: 2000 fpm Flange Width: 1 1/2 in Frame Depth: 2 1/4 in Open Depth: 6 1/4 in Frame Opening A: 16 in Frame Opening B: 16 in Mounting Hole Size: Prepunched