Running your dishwasher: Wash full loads and use the energy-saver setting for an additional savings. Use your dishwasher’s booster heater; it heats the water used in the dishwasher to 140°F, allowing you to set your water heater at an energy-efficient 120°F.
Out with the old, in with the new
Your refrigerator uses the most energy of any appliance in your home if you consider that it runs 24 hours, seven days a week. According to ACEEE, there are 126 million refrigerators and 38 million freezers using 200 billion kWh a year.