ENERGY STAR is a dynamic government/industry program designed to help individuals and businesses protect the environment through superior energy efficiency. The program helps consumers quickly and easily identify energy-efficient products that help save money and protect the environment.

Not all windows qualify for the ENERGY STAR label. They must first be tested by an independent laboratory to meet stringent criteria pertaining to energy efficiency and light transmittance. The ratings they achieve differ because of variables such as the glass used, style, and product design and construction.

The insulating properties of the entire window determine whether or not a window can be ENERGY STAR labeled. Windows with clear single-pane glass can’t achieve the ratings necessary to qualify for ENERGY STAR labeling. High-performance glass systems, which consist of double- or triple-insulating glass, low-emissivity (Low-E) coatings and an inert gas between the glass panes, are typically necessary for windows to comply with ENERGY STAR requirements.

ENERGY STAR labeled windows help reduce energy costs, increase a home’s comfort, and protect against UV damage. These products are also better for the environment—because they reduce fossil fuel burning and green house gas emissions—and for the country because they reduce the America’s dependency on foreign oil.