DAYTON 5C214 20 in 23"H-W 6.5"L Fiberglass Backdraft Damper, 20-1/2 in x 20-1/2 Window Blinds

DAYTON 5C214 20 in 23"H-W 6.5"L Fiberglass Backdraft Damper, 20-1/2 in x 20-1/2 23 In.H-W 6.5 In.L Fiberglass Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Fiberglass, Number of Panels 1, Maximum Air Velocity 2500 fpm, Overall Height 23 in, Rough Opening Diameter 20 1/2... DAYTON 5C214 20 in 23"H-W 6.5"L Fiberglass Backdraft Damper, 20-1/2 in x 20-1/2
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