How to Lower Your Water Heater Temperature lowering your water heater thermostat Department of Energy normally U.S. Department of Energy Lower the temperature of your water heater save you up to $400 annually 120ºF would do just fine US Department of Energy EnergyStar.gov US Department of Energy Department of Energy EnergyStar.gov guidelines set it at 120°F Lower water temperature setting – $31 to $61 each year US Department of Energy Department of Energy EPA recommends a temperature setting of 120° $12-30 for every 10 degrees heaters are set at 140 degrees US Department of Energy lowering the temperature 4 to 22% annually turning the temperature of your water heater down hot water heater How to Lower Your Water Heater Temperature standby losses Lower Water Heating Temperature risk of legionellae bacteria growing Energy.gov $36 and $61 per year Lower the temperature of your water heater EnergyStar.gov Lowering the temperature EnergyStar.gov Lower water temperature setting – Lowering your water heater EnergyStar.gov Department of Energy This short video EnergyStar.gov According to the U.S. Department of Energy setting the thermostat too high hot water heater to 120ºF Department of Energy Department of Energy $12 and $30 each year EnergyStar.gov Energy.gov guide the legionella bacteria recommends a water heater temperature of 140F set at 120°F energy.gov EnergyStar.gov water heater Department of Energy basic instructions energy.gov hot water heater to 120ºF $460 off your annual electric bill recommends a water heater temperature of 140F energy.gov EnergyStar.gov