ENERGY STAR makes it simple for consumers and businesses to purchase products that save them money while protecting the environment. EPA ensures that each product that earns the ENERGY STAR label is independently certified to deliver the efficiency performance and savings that consumers have come to expect. ENERGY STAR-certified homes and apartments are at least 10 percent more energy efficient than those built to code and achieve a 20 percent average improvement in energy efficiency, while providing homeowners and residents with energy performance and comfort. EPA also provides trusted guidance and online tools to help homeowners make informed decisions about improving the energy efficiency of their existing homes.