S/N-98463. UNIT OPERATES AT 460 VOLT, 3 PHASE, 60 Hz, AT 3450 RPM WITH A 3/4 HP 208/230/460 VOLT MOTOR. DIRTY AIR INLET IS 4" DIAMETER AND CLEAN AIR OUTLET IS APPROXIMATELY 6" DIAMETER. OVERALL DIMENSIONS 45"H X 28"W X 30"D. COOLING EXHAUST BLOWER VENT OUTLET ON TOP OF UNIT. WITH EXHAUST FAN BUILT IN WITH 3/4 HP MOTOR.