Rheem Ecosense Rete-3 - 3kw Point of Use Electric Tankless Water Heater rugged brass and copper heat exchanger 3.0 KW water heater requires 120 volt electric service 0.7 GPM continuous flow at a 35 degree Fahrenheit temperature rise dedicated 30 amp breaker and 10 gauge copper wiring continuous hot water at a single point-of-use faucet