Dayton Round Smoke Damper,24V,8-1-4 In. D 3HGH3

Round 7.9 In.dia Motorized Smoke Damper, For Nominal Duct Diameter 8 in, Damper Application Smoke, Number of Panels 1, Overall Height 7 7/8 in, Overall Length 8 1/8 in, Rough Opening Shape Round, For Duct Shape Round, Overall Width 8 1/4 in, Frame Material Thickness 20 ga, Blade Material Galvanized Steel, Maximum Air Pressure 4 in wg, Overall Diameter 7 7/8 in, Rough Opening Width 8 in, Damper Type Dynamic, Maximum Air Velocity 3000 fpm, Nameplate Voltage 24V AC, Rough Opening Diameter 8 in