47.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter 48 in Frame Material Galvanized Steel Number of Panels 1 Maximum Air Velocity 2250 fpm Overall Height 47 3/4 in Rough Opening Diameter 48 in Rough Opening Shape Square Fits Fan Diameter 48 in For Duct Shape Square Free Area 14.7 sq ft Overall Width 47 3/4 in Frame Material Thickness 20 ga Overall Length 4 1/2 in Frame Depth 2 in Rough Opening Length 48 inMRO3HHN3
| # | Attribute | Value |
|---|---|---|
| 1. | brand | DAYTON |

