EcoSMART 240V Single Phase 18kW Electric Tankless Water Heater 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. Capacity 3.5 gpm, Type Tankless, Fuel Type Electric, Wattage 18000W, Voltage 240V, Height 17-3/4 In., Width 14 In., Depth 4-1/4 In., Family Size 3, For Mobile Home Use No, Uniform Energy Factor 0.998, Warranty Lifetime, Pkg Qty 1, Package Type Box