Pressure Ventilation Blower Size 18 In. Air Flow 8748 cfm Power Source Electric Height 24.25 In. Width 22 In. Depth 21 In. Voltage 115V Amps 13.4A HP 1 RPM 1750 Motor HP 1 Motor RPM 1750 Fan Speed Single Free Air 8748 cfm Maximum Flow in Free Air 8748 cfm Color Yellow/Gray Standards GFCI