Pentair 460932 UltraTemp 110 High Performance Pool Heat Pump Heat Only 230 Volt 60 Hertz 1 br click here to buy 60-Hertz frequency 50-ampere breaker size single phase 230-Volts and 8-feet wire 108000-BTU br Compatible with all automated control packages br 100 percent pure titanium heat exchanger assures corrosion-free performance br Automatic defrost feature senses refrigerant temperature and prevents ThermalFlo from freezing it allows the heat pump to operate at lower temperatures br Measures 43-inch length by 50-inch height by 34-inch width