Electric water heating efficiency

Approximately 12-20% of your annual energy usage goes to producing hot water for cooking, bathing, laundry, dishwashing and miscellaneous other uses.

Here are a few things you can do to improve the efficiency of your water heater and use less hot water at home.

  • Set your water heater thermostat to 120 degrees. Turning the thermostat down from 140 degrees to 120 degrees can save up to $7 per month.
  • Install a timer on your electric water heater if you are an SRP Time-of-Day Price Plan . This will keep the unit from cycling on during on-peak hours. If you are able to set your unit to cycle on during off-peak hours, then you may want to consider purchasing a larger unit, which would allow you to access a larger reservoir of hot water supply during on-peak hours.
  • Check for leaks around your water heater by looking for standing water. Also, put your ear to the water heater to listen for water running when no faucets are on. This can indicate a cracked or broken water line.
  • Wash laundry using cold water, whenever possible. Approximately 90% of the energy used to wash clothes goes to heating water, so you can save money using cold.
  • Repair leaking water faucets and make sure faucets are turned off completely. A dripping hot water faucet can leak hundreds of gallons a year, adding to your water heating costs.
  • Install aerators on faucets to limit flow to 1.5 gallons of water per minute or less.
  • Take short showers instead of baths. A five-minute shower typically uses less than 15 gallons of water while filling a bathtub can use 30 to 40 gallons.



Did you know?

Up to 20% of your annual electric bill is from heating water.