This manual damper includes pre-punched conduit hole knock-out, felted edges for quiet operation, is made of galvanized steel, and it measures 11½ inch width, 11½ inch height, 4½ inch length. This manual damper is ceiling mountable.
Technical Specs
ItemManual Damper
Frame MaterialGalvanized Steel
Maximum Air Velocity2,000 fpm
Rough Opening Diameter10 in
Fits Fan Diameter10 in
Free Area0.4 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
Flange TypeRear Flange
Airflow DirectionVertical
Damper ApplicationBackdraft
Number of Panels1
Overall Height11 1/2 in
Rough Opening ShapeSquare
For Duct ShapeSquare
Overall Width11 1/2 in
Overall Length4 1/2 in
Rough Opening Length10 in
Rough Opening Width10 in
Damper TypeStatic
Blade TypeFlat Blade
Closure TypeGravity
Blade OrientationParallel Blades
Frame Less Flange9.50 sq in
CounterbalancedNot Counterbalanced
Mounting LocationCeiling
Blade Seal MaterialFelt
Mounting PositionHorizontal
Country of OriginUnited States
(subject to change)