The U.S. Department of Energy (DOE) plans to invest $9 million in building envelope technology, and one area of focus is high-performance windows.

According to Energy Secretary, Steven Chu, the average American family spends about $2,000 per year on their home energy bills, yet much of that money is wasted on air leaks. DOE says bringing more energy efficient products into the market can improve energy savings and strengthen U.S. manufacturers.

The National Fenestration Rating Council’s (NFRC) energy performance rating label helps consumers and industry professionals determine how windows, doors, and skylights will perform.