What makes windows energy efficient?

There are a number of design elements which make windows energy efficient. The federal government has a program called Energy Star, which sets guidelines on these elements. In order to meet the federal government’s qualifications on energy efficiency and get the Energy Star designation, windows have to meet certain performance criterion that help to keep your home warm in cold climates and cool in hot climates. Generally, the government will certify windows that are manufactured with frames made of quality, durable, low maintenance materials and sashes made of double pane glass that utilize gas fills and special e-glass coatings. These elements result in superior insulation and with it, greater energy efficiency. Installing energy efficient windows can result in lower utility bills and greater comfort, in addition to enhancing the resale value of your home. Further, there are federal tax credits available for the installation of windows that meet the Energy Star guidelines.