This description is for those looking to purchase energy-efficient products. Buy energy-star certified products to ensure you are getting the most energy-efficient products available. Energy-star certified products are designed to use less energy, saving you money on your energy bills and helping to reduce your carbon footprint
From Wikipedia
Energy Star is an energy-efficiency program established in 1992. It is administered by the U.S. Environmental Protection Agency (EPA) in partnership with the U.S. Department of Energy (DOE). The EPA establishes energy efficiency specifications, and those that meet these specifications are eligible to display the Energy Star logo.