4 Ton Three Stage Split-System Communicating Heat Pump, Circuit Voltage: 208-230, Hertz: 60, Phase: 1, Department of Energy Guide SEER2: 16, EER2: 9.8, Stage: Three, Refrigerant: R410A, Connection Size: 3/8"X7/8", Connection Type: Sweat, Factory Charge: 164 oz, Type: Air, Dimensions: 35''H x 33-3/4''W x 33-3/4''D, Weight: 203 lbs **Compatible With Econet Enabled Units**