Manufacturer: American Warming and Ventilating

BD-42 1-½” Commercial Rectangular Backdraft Damper.
Gravity Operated Backdraft, Single Thickness (Horizontal Mount, Upflow).

Damper Depth1-1/2"

DescriptionGravity Operated Backdraft, Single Thickness (Horizontal Mount, Upflow)

Max Face Velocity1500 FPM

Max Pressure1 in. wg

Max Temperature200 F

Min Size6" x 6"

Max Size30" x 72"

Frame Material.063 6063-T5 Extruded Aluminum (Drop-In)

Blade Material24 Ga. Aluminum thru 22 Ga. Aluminum

Axles3/16" Dia. Plated Steel, Full Length

BearingsHeavy Duty Molded Nylon

LinkagePlated Steel Brackets, Stainless Steel Shoulder Rivets and Aluminum Linkage Bars

StopsAluminum Angle


ActuatorGravity Operated Is Standard (Optional Manual or Electric)

SealsPolyurethane Sponge On The Sill and Felt Between Adjacent Blades