Back draft damper, 15 x 15 inches, outside flange 17 x 17 inches, roof mount , G-90 galvanized steel frame, 2 inch deep with 1 inch flange, felted aluminum blades for quiet operation.
Technical Specs
ItemManual Damper
Frame MaterialGalvanized Steel
Maximum Air Velocity2,000 fpm
Rough Opening Diameter15 1/2 in
Fits Fan Diameter12 in
Free Area1.1 sq ft
Frame Material Thickness20 ga
Frame Depth2 in
Maximum Pressure1 in wc
Blade MaterialAluminum
Single Acting/Double ActingSingle Acting
Maximum Ambient Temperature180 Degrees F
Flange Width1 in
Closure Velocity Rating2,000 fpm
Switch ActionNormally Closed
IncludesPre-Punched Conduit Hole Knock-Out, Felted Edges for Quiet Operation