1. Eighty Percent of the energy used in automatic dishwashers goes toward heating water. Significant savings take place by running the dishwasher only when it is full. Running a half-filled dishwasher twice used two times as much energy as running a full load once.
2. Washing dishes by hand may not save energy or money. In fact, you can probably save energy using the dishwasher since hand-washing usually requires more hot water.
3. When shopping for a new dishwasher, look for models that require less hot water. Dishwashers differ in the number of gallons of hot water used in the wash cycle. The manufacturer’s specifications or the Energy Guide Label should list this information.
4. Many new dishwashers have an internal water heater that rises the temperature of the incoming water to 140 degrees. This device allows you to turn down the temperature on the water heater in your home and still have your dishes washed thoroughly.
5. Take advantage of the energy saving control on many dishwashers. It turns off the heat during the drying cycle. Opening the dishwasher after the rinse cycle and letting the dishes air dry is another way to save energy.