The Hubbell Model TX/TXA electric tankless water heater contains high powered heating elements that heat water only when there is demand for hot water. When hot water is needed, a built in fow sensor measures the exact fow rate, and that data combined with temperature readings at the heater’s inlet and outlet are processed by the electronic temperature controller. This data is continuously transmitted to the temperature controller, which constantly calculates the precise amount of power (kW) needed to achieve the desired temperature. The Hubbell tankless heater uses only as much power as is needed, while delivering accurate and consistent hot water temperature.