Energy-efficient Rheem electric tankless water heater only heats water when you need it and features an external temperature display and control, and self-modulating power technology. Compact model can save energy, water, and is ideal for delivering unlimited hot water in commercial and residential applications. Requires no venting, T&P valve, or drain pan to help ease installation. Includes durable brass or stainless steel heat exchanger and a field serviceable element. Item: Electric Tankless Water Heater Water Heater Design: Point-of-Use Water Heater Application: Undersink Commercial / Residential: Commercial/Residential Watts - Water Heaters: 5500 Amps - Water Heaters: 29 Voltage - Water Heaters: 208/240 Min. Flow Activation: 0.30 gpm Phase - Water Heaters: 1 Temp. Range - Water Heaters: 59 Degrees to 140 Degrees F Water Connection: 1/2" NPT Temp. Rise @ 0.5 GPM: 75 Degrees F Item - Water Heaters: Electric Tankless Water Heater Temp. Rise @ 6.0 GPM: Limited to Thermostatic Setting Elements: Lead-Free Replaceable Cartridge Insert Default Temperature: 120 Degrees F Mounting: Wall Pressure Range: 25 to 150 psi Max. Flow Rate: 1 gpm Wire Size: 10 AWG Height: 5-7/8" Width: 10-7/8" Depth: 2-3/4" Features: Endless Hot Water, Replaceable Heating Element, Digital Temperature Display Standards: UL 499, CSA