DAYTON 4YN18 36 in Backdraft Damper / Intake Shutter, 37 in x 37 in
$234.99
38.75 In.H-W 4.5 In.L Alu Intake Shutter Dampr, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 38 3/4 in, Rough Opening Diameter 37 in, Rough Opening Shape Square,...