Upblast Ventilator, Drive Type Direct, Number of Speeds 1, Wheel Dia. 21-1/4", CFM @ 0.000-In. SP 6412, CFM @ 0.125-In. SP 6224, CFM @ 0.250-In. SP 6036, CFM @ 0.375-In. SP 5855, CFM @ 0.500-In. SP 5674, CFM @ 0.625-In. SP 5479, CFM @ 0.750-In. SP 5283, CFM @ 0.875-In. SP 5063, CFM @ 1.000-In. SP 4837, CFM @ 1.250-In. SP 4276, CFM @ 1.500-In. SP 3445, Sones @ 0.125-In. SP @ 5 Ft. 24, Sones @ 0.250-In. SP @ 5 Ft. 23, Sones @ 0.500-In. SP @ 5 Ft. 22, Assembled Yes, Motor Voltage 208-230/460, Phase 3, Hz 60, Max. Operating Amps 6.2/3.1, Motor HP 2, Max. BHP 1.74, RPM 1140, Base Length 27-3/4", Overall Dia. 35-3/8", Base Width 27-3/4", Shaft Dia. Sheave End 5/8", Shaft Dia. Wheel End 5/8", Overall Height 35-3/8", Max. Inlet Temp. 300 Degrees, Housing Material Spun Aluminum, Mounting Location Wall, Wheel Material Aluminum, Speed Controllable No, Recommended Damper Size (In.) 17 x 17, Recommended Damper Stock No. 5NKN4, Adj. UL 762 Kitchen Roof Curb Stock No. 4HX62, Includes NEMA 1 Junction