If you go with a top-loader, buy a unit that uses less, cooler water and has a high energy factor, or EF, rating. The minimum allowable EF rating for standard washers is 1.18, but high-efficiency units have a rating of 2.5 or higher. The EF rating is posted on the Energy Guide label on the appliance. Using warm rather than hot water cuts energy use in half. Adjustable water levels .
Small loads consume less water.
A mini-basket . This small tub fits over the agitator and allows you to wash very small loads of laundry. A presoak option also conserves energy. Faster spin speeds . These take more water out of clothes, reducing drying time.