57 In.H-W 6 1/4 In.L Alum Wall Fan Shutter Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Galvanized Steel Number of Panels 2 Maximum Air Velocity 2500 fpm Overall Height 57 in Rough Opening Diameter 54 1/2 in Rough Opening Shape Square Fits Fan Diameter 54 in For Duct Shape Not Applicable Free Area 17 sq ft Overall Width 57 in Frame Material Thickness 20 ga Overall Length 6 1/4 in Connection Type Not Applicable Frame Depth 2 1/2 inMRO3C115
| # | Attribute | Value |
|---|---|---|
| 1. | brand | DAYTON |

