Designed to help provide energy savings and increase efficiency, the BCE5E's constant torque motor provides a steady flow of air, maintaining a more consistent airflow than a single-speed PSC motor. The unit works most effectively when paired with a matched Armstrong Air heat pump or air conditioner, saving you money every month, and it may qualify for local utility rebates. Armstrong Air Air Handler, Multi-Position, Series: 5 Series, 3.5 ton Nominal, 49100 Btu/hr Heating, 1750 cfm Flow Rate, 208/230 VAC, 1 ph, 60 Hz Power Source, 3/8 in Liquid Line, 7/8 in Suction Line, 90 A Fuse, 19-1/2 in W x 14-1/2 in H Supply Air Opening, 19-1/4 in W x 20-3/8 in D Return Air Opening, 18 x 20 in Filter, Constant Torque Control, R-410A TXV Refrigerant, Constant Torque Motor, Galvanized Steel, 21-1/2 in W x 22 in D x 53.63 in H Dimensions