Overview Product Description MH290 Single Phase Exhaust Ventilators Commercial and Industrial **Please Note Product May ship under original Marathon number** (see cross references) Model Number: 56S17D2056 Catalog Number: B321 Product Type: SPLIT PHASE Enclosure: DP Frame: 56CZ Multiplier Symbol: F1 Dimensional Drawing A-SS79626-700 PDF Connection Diagram A-EE7195A PDF HP: .5 Frequency (HZ): 60 Speed (RPM): 1800 Mounting: ROUND Phase: 1 Motor Wt: Volts: 115 Insulation Class: B F.L. Amps: Duty: CONTINUOUS Service Factor: 1.25 Max. Ambient: 40 Bearing: BALL/BALL F.L. Eff.: DE Bearing: Thermal Protection: NONE OPE Bearing: KVA Code: L Hazardous Location: NONE Cross Reference: 177811 B401 J033 Q56C34D2110 B665 5KH42JN3286 Marathon B321 6XH52 Product Videos Custom Field Product Reviews