If your dishwasher is over 15 years old it may be using 10 gallons more water per cycle than an energy efficient dishwasher. This can mount up to over 3,650 gallons of water going to waste over a year.
When you begin to look for a replacement for your old inefficient dishwasher, be sure to check the Energy Guide label to see how much energy the machine will be consuming. The Energy Guide label also compares energy use of similar appliances and will estimate the annual operating costs. These labels are a useful way to compare models and help you make an informed choice.
New energy efficient dishwashers have unique functions that older models do not. A booster heater increases the temperature of the water entering the dishwasher to the recommended cleaning temperature of 140 degrees Fahrenheit. This allows you to lower your home water heater to 120 degrees, saving energy and still achieving the temperature needed to clean all your dishes.
You should also look for an energy efficient dishwasher that has an “air drying” option. This is far more efficient than “heat drying” and will cut the dishwashers energy use by 15 to 20%. If you have a dishwasher without this option, instead of using “heat drying” simply open the door once the machine has finished its cycle to dry your dishes. This is save you more energy than you would expect.