Washer Tips:

Locate the washing machine close to the hot water tank, if possible, to reduce the heat loss in long pipe runs. Insulate exposed pipes.
Keep your hot-water heater thermostat setting at 120°F. Each 10°F reduction in water temperature will cut the cost of washing clothes by up to 13%.
You can save considerable amounts of energy in the laundry through conservation of hot water and by using your automatic washers and dryers less often and more efficiently.
Wash most clothes in warm or cold water, using cold-water detergents whenever possible ; rinse in cold. You'll save energy and money. Use hot water only if absolutely necessary. Switching the washer temperature setting from hot to warm could reduce a load's energy in half.
Fill washers (unless they have a small-load attachment or variable water levels), but do not overload them. In general, washing one large load is more efficient than washing two small loads.
Don't use too much detergent. Follow the instructions on the box. Over-sudsing makes your machine work harder and use more energy.
Do not over-wash clothes. Delicate clothes don't need as long a wash cycle as dirty work clothes.
Presoak or use a soak cycle when washing heavily soiled garments. You'll avoid two washings and save energy.