Centrifugal Inline Duct Fan, Housing Material Galvanized Steel, Fits Duct Dia. 8 In., Voltage 120, Max. Amps 1.32, Max. Wattage 75.5, Number of Speeds 1, Housing Dia. 13-3/8 In., Length 6 In., CFM @ Duct 390, CFM @ 0.000-In. SP 428CFM @ 0.200-In. SP 410Max. Inlet Temp. 140 Degrees F, Inlet and Outlet Dia. 8 In., 60 Hz, 1 PhaseMotor RPM 2545, Motor Enclosure 44 IPFlange Width 1-1/8 In., Speed Control Yes, Housing Finish G90, Mounting Position Horizontal or Vertical 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.