Upblast Ventilator Drive Type Belt Wheel Dia 21-1/4 In. CFM @ 0.000-In. SP - Assembled No Motor Voltage 208-230/460 3 Phase 60 Hz Max Operating Amps 3.6-3.8/1.9 Motor HP 1 Max BHP 1.04 RPM 1110 Base Length 30 In. Base Height 1-3/4 In. Overall Dia 35-3/8 In. Base Width 30 In. Shaft Dia Sheave End 1 In. Shaft Dia Wheel End 1 In. Overall Height 30-3/8 In. Max Inlet Temp 300 Degrees Housing Material Spun Aluminum Mounting Location Roof Wheel Material Aluminum