39 In.H-W 5.75 In.L Alu Wall Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Galvanized Steel Number of Panels 1 Maximum Air Velocity 2500 fpm Overall Height 39 in Rough Opening Diameter 36 1/2 in Rough Opening Shape Square Fits Fan Diameter 36 in For Duct Shape Not Applicable Free Area 7.4 sq ft Overall Width 39 in Frame Material Thickness 20 ga Overall Length 5 3/4 in Connection Type Not Applicable Frame Depth 2 1/2 inMRO4C521
| # | Attribute | Value |
|---|---|---|
| 1. | brand | DAYTON |

