Washing your clothes in cold water is an easy way to save energy and prevent carbon pollution. Hot water heating accounts for about 90 percent of the energy your machine uses to wash clothes — only 10 percent goes to electricity used by the washer motor.
Depending on the clothes and local water quality (hardness), many homeowners can effectively do laundry exclusively with cold water, using cold water laundry detergents. Switching to cold water can save the average household as much as $40 annually.
Much like running the dishwasher with only a full load [link to dishwasher post], washing clothing in full loads can save more than 3,400 gallons of water each year!
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