3.5 Ton Inverter Stage Split-System Communicating Heat Pump, Circuit Voltage: 208-230, Hertz: 60, Phase: 1, Department of Energy Guide SEER2: 17.5, Stage: Inverter, Refrigerant: R410A, Connection Size: 3/8"X1-1/8", Connection Type: Sweat, Factory Charge: 118 oz, Type: Air, Dimensions: 39''H x 37''W x 12-5/8''D, Weight: 168 lbs **Compatible with Amana Smart Thermostat and other Amana Communicating Equipment** ***Unit includes a Manufacture Warranty, register your unit with the Manufacturer for details***