Configured for climates where incoming water temperatures are in the 60 deg. to 70 deg. F. range. Self-modulating flow-sensor technology regulates the amount of energy required to heat the water needed. Digital temperature display showing the outlet water temperature setting. Uses (2) 9 kW standard Emerson electric heating elements with brass tops to prevent electrolysis. Copper heat exchanger. Automatic resettable thermostat. (2) 40 DP breakers required. 75A draw. Required wire: 2 sets 8 AWG. Pipe fitting: 3/4" NPT. Energy factor: 0.998. UL and CSA certified. Dimensions: 14" x 17.75" x 4.25". Weight: 9 lb. Lifetime warranty.