Electric Tankless Water Heater Operating Voltage 208V AC Phase Three Cold Inlet Size 1 1/4 in Maximum Flow Rate 40 gpm Minimum Flow Activation 2.5 gpm Overall Height 17.61 in Overall Width 26.17 in Overall Depth 10.28 in Power Consumption 64 000 W Maximum Delivered Temperature 140 Degrees F Minimum Delivered Temperature 80 Degrees F Current 178 A Environment Indoor Market Commercial Industrial Application Low Duty Cycle Control Type Digital Display with Keypad