4 Ton Two Stage Split-System Communicating Heat Pump, Circuit Voltage: 208-230, Hertz: 60, Phase: 1, Department of Energy Guide SEER: 16, Stage: Two, Refrigerant: R410A, Connection Size: 3/8"X7/8", Connection Type: Sweat, Factory Charge: 13.73 lbs, Type: Air, Dimensions: 40-1/4''H x 35''W x 35''D, Weight: 302 lbs **Compatible With Observer Communicating Units**