Roof Fan Motor Conversion Kit Compatible Grainger Part Number 43Y140 Motor Horsepower 1 hp Maximum Motor Speed 1 725 RPM Minimum Motor Speed 300 RPM Nameplate Voltage 115V AC Phase 1 For Fan Type Upblast Fans Shaft Diameter 5/8 in Application Convert Exhaust Fan to Variable Speed Fan Current 12.4 A For Use With 43Y140 Maximum Motor Horsepower 1 hp Motor Enclosure Open Dripproof Motor Type Electronically Commutated Standards cUL UL