Reduce your water heater's temperature
Water heating accounts for up to 20% of a typical home's total energy use. Each 10°F you lower the temperature of your water heater can result in a 6-10% savings in water heating costs.
Step by step:
Check the owner's manual for safety instructions before making any changes to your water heater's settings.
- Measure your current water temperature. Your water heater thermostat may be inaccurate, so it can be helpful to measure the water with a thermometer at the tap farthest from the water heater. If the water's temperature is above 120°F, proceed to the next step.
- Mark the temperature setting and lower temperature. Using a marker, make a mark on the dial before turning the thermostat down so you can adjust later if needed. Lower the temperature setting.
- Wait and re-measure. After a few hours, measure the water temperature again with a thermometer and adjust as needed until you reach 120°F.
- Mark the temperature. Once you have reached 120°F, mark the setting on your dial for future reference.
Good to know: Note that if your dishwasher does not have a booster heater, a water temperature of 130-140°F may be necessary. Consult your owner's manual for information.