Energy Star is a label that identifies energy efficient products such as heating and cooling equipment, which meet strict energy efficiency guidelines set by the U.S. Environmental Protection Agency (E.P.A.) and the U.S. Department of Energy (D.O.E.). Products that have earned the ENERGY STARhelp you save energy and money without sacrificing performance. Heating and cooling equipment that has earned the government’s ENERGY STAR, combined with properly sealed ducts, saves energy, money and the environment and may also improve the comfort level in your home. Heating and cooling can account for nearly half of the energy used in your home, according to the E.P.A. While qualified heating and cooling products may cost more initially, they can yield annual returns of 15-30 percent in lower energy bills.