For over 60 years AAMA (American Architectural Manufacturers Association) has been recognized around the world for development of standards that provide third-party validation of product performance & quality.
ASTM is a not-for-profit organization that provides a forum for development & publication of voluntary consensus standards for materials, products, systems & services.
Energy Star® is a voluntary partnership between the US Department of Energy, the US Environmental Protection Agency & the fenestration industry.
The NFRC (National Fenestration Rating Council) establishes test criteria that set the standard for performance ratings for manufacturers of window & door products. Primary goal is to provide accurate information on energy performance of these products.