National Fenestration Rating Council logo The National Fenestration Rating Council (NFRC) The nation’s recognized organization for measuring and evaluating window energy performance. For more information about NFRC, visit them at

Northwest Energy Efficiency Alliance The Northwest Energy Efficiency Alliance is a nonprofit group of electric utilities, state governments, public interest groups, and industry representatives committed to bringing affordable energy efficient products and services to the marketplace.

Efficient Windows Collaborative logo Part of the Alliance to Save Energy, the Efficient Windows Collaborative works with the window industry and the Department of Energy’s laboratories. For more information about the Efficient Windows Collaborative, visit them at

Energy Star logo Visit the ENERGY STAR Web site at

national renewable energy laboratory logo National Renewable Energy Laboratory Center for Buildings and Thermal Energy Systems. From fundamental science and energy analysis to validating new products for the commercial market …

american architectural manufacturers association logo American Architectural Manufacturers Association. The American Architectural Manufacturers Association (AAMA) is the source of performance standards product certification and …

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