Multi-speed, constant torque, brushless DC motor. Automatically determines motor rotation direction. 5 discrete speeds using 24VAC (3 using 18VDC). Operating speed range of 600-1200 rpm. NEMA 48-frame (5.6 inch diameter) Belly Band Mount with 5-inch long ½ inch diameter shaft. UL and CSA recognized component. Standard ECM Replacement (Does not replace premium ECM constant airflow products such as Eon, 3.0, 2.3, and 2.5). Maintains ECM-level Efficiency up to 80%. Soft Start and Off Ramp for quiet operation. Electronic Overload Protection