Clothes Washers & Dryers Why Buy an Energy-Efficient Clothes Washer or Dryer? Clothes washers and dryers are some of the highest-energy-using appliances in your home. ENERGY STAR certified washers and dryers use less energy than standard models, without sacrificing performance. Did you know that water heating consumes about 90 percent of the energy used to operate a clothes washer? ENERGY STAR certified washers use about 25 percent less energy and 33 percent less water than standard models. These advanced models are also designed to extract more water during the spin cycle – allowing for shorter drying times and reduced wear and tear on your clothes. ENERGY STAR certified dryers use about 20 percent less energy than standard models, without sacrificing performance. These advanced models use energy-saving technologies, such as moisture sensors, that detect when clothes are dry and automatically shut the dryer off.