Factors impacting water heater energy consumption can be separated into two categories: those affecting the amount of hot water used and those affecting the efficiency of the water heating system.

Factors impacting the amount of hot water used are the amounts consumed for bathing, showering, shaving and other purposes, as well as the use of clothes washers and dishwashers. The factor with the largest impact on water heating energy consumption typically is showering habits.

Variations in the temperature of water entering the water heater also can have a substantial impact on energy consumption. In general, the lower the temperature of water, the less energy being used to heat it.

Energy-efficient water heaters lower utility bills by reducing the energy used to heat water in your home while providing hot water when needed.

Best Practices for Increasing Water Heater Efficiency