Inline Centrifugal Duct Fan, Housing Material Galvanized Steel, Fits Duct Dia. 8 In., Voltage 115, Max. Amps 1.45, Max. Wattage 157, Number of Speeds 1, Housing Dia. 13-3/8 In., Length 8-1/4 In., CFM @ Duct 502, CFM @ 0.000-In. SP 502CFM @ 0.125-In. SP 487, CFM @ 0.200-In. SP 470, CFM @ 0.250-In. SP 465, Max. Inlet Temp. 140 Degrees F, Inlet and Outlet Dia. 7-7/8 In., 60 Hz, 1 Phase, Motor HP 1/8, Motor RPM 2950 Centrifugal In-Line Duct FansFG SeriesPrewired fans have lower sound levels than comparable surface-mounted fans. Max. temp.: 140 F. Mounting bracket included.Airtight housing. Backward curved impeller.All are UL and C-UL Listed.ENERGY STAR qualified. HVI certified.Mount: horizontally or vertically Bearings: ball Speed controls, designer grilles, and dampers sold separately, this pageGalvanized SteelExternally mounted wiring box, 3L x 31/2W x 11/2"D. Class B motor.AMCA Certified.