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Energy Saving Dishwashers
About Dishwasher Efficiency:
Dishwashers operated at full capacity can
be an efficient alternative to hand washing. Around 80% of the energy used
by dishwashers goes towards heating the water.
Tips for Lowering Your
Dishwasher Energy Usage:
Always operate a dishwasher with a
full load and select an energy-saving cycle whenever possible. The
dishwasher uses the same amount of water whether it is half full or
Don't pre-rinse dishes before putting
them in the dishwasher. Scrape-off food and empty liquids. Soaking or
prewashing is generally recommended in cases of burned-on or dried-on
food. If you must rinse dishes, use cold water.
Load dishes according to
manufacturers instructions and allow for proper water circulation.
Don't use the "rinse hold" on your
machine for just a few soiled dishes. It uses 3 to 7 gallons of hot
water each time you use it.
If your dishwasher has a booster
heater, turn down your water heater thermostat setting to 120°F.
Select the air-dry option, if your
machine has it. If not, stop the machine before the drying cycle begins
and open the doors to let dishes air-dry.
Help your dishwasher operate more
efficiently by checking drains and filters to make sure that they are
not clogged with food.
Tips for Buying
a New Dishwasher:
Look for ENERGY STAR models. ENERGY
STAR qualified dishwashers use 25% less energy than the federal minimum
standard for energy consumption. Because they use less hot water
compared to conventional models, an ENERGY STAR qualified dishwasher
saves about $100 over its lifetime.
There are two dishwasher
classifications: compact capacity and standard capacity. Compact models
use less energy, but they hold fewer dishes. A compact model may
actually result in greater energy use if you have to operate it more
Choose a dishwasher that provides
several different wash cycle selections. If your dishes are only
slightly soiled, you can use a "light wash" or "energy-saving" wash
cycle and save energy by using less water and operating for a shorter
period of time.
Look for a dishwasher that allows you
to choose between heat-drying and air-drying. Heat-drying elements draw
considerable electricity; circulation fans for air-drying use very
Keep in mind that EnergyGuide ratings
for dishwashers are based on washing 322 loads annually using the normal
settings. If you are considering a model with other setting options that
you would use most of the time, your energy use could vary
U.S. EPA's ENERGY STAR Program,
and the Los Angeles Department of Water and Power