27.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr Damper Application Backdraft For Nominal Duct Diameter Not Applicable Frame Material Aluminum Number of Panels 1 Maximum Air Velocity 2250 fpm Overall Height 27 3/4 in Rough Opening Diameter 25 1/2 in Rough Opening Shape Square Fits Fan Diameter 24 in For Duct Shape Square Free Area 3.8 sq ft Overall Width 27 3/4 in Frame Material Thickness 0.1 in Overall Length 4 1/2 in Connection Type Not Applicable Frame Depth 1 5/8 inMRO5NKN6
| # | Attribute | Value |
|---|---|---|
| 1. | brand | DAYTON |

