Most people know propane as the fuel in a white container attached to a barbecue grill. But propane has long proven its versatility for heating homes, heating water, cooking, drying clothes, fueling gas fireplaces, and lighting and heating outdoor living spaces. Propane is used by more than 12.6 million U.S. households for space heating and other purposes and by millions of other Americans for agricultural, commercial, industrial, and transportation applications. As a clean, versatile energy source, propane is frequently used for space heating, water heating, cooking, fireplaces, and clothes drying. In outdoor spaces, propane is a widely used energy source for outdoor grills, lighting, and heating for pools and spas. When electric power goes out, propane is often the energy that powers standby generators.