Roof Fan Motor Conversion Kit Compatible with Grainger Part Number 43Y140 Motor Horsepower 1/6 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 1/2 in Application Convert Exhaust Fan to Variable Speed Fan Current 3.1 A For Use With 43Y140 Maximum Motor Horsepower 1/5 hp Motor Enclosure Totally Enclosed Motor Type Electronically Commutated Standards cUL UL