Electric Tankless Water Heater, Operating Voltage 208/240V AC, Phase Three, Cold Inlet Size 3/4 in, Maximum Flow Rate 20 gpm, Minimum Flow Activation 0.5 gpm, Overall Height 18.52 in, Overall Width 20.47 in, Overall Depth 5.84 in, Power Consumption 18,000 W, Maximum Delivered Temperature 70 Degrees F, Minimum Delivered Temperature 180 Degrees F, Adjustable Thermostat Yes, Current 50 A, Environment Indoor, Market Commercial, Industrial