• NFRC, National Fenestration Rating Council

  The NFRC is an independent non-profit organization that establishes objective window, door, and skylight energy performance ratings to help you compare products and make informed purchase decisions.

• NFRC, National Fenestration Rating Council

• BOCA, Building Officials and Code Administrators International, Inc.

• Building Energy Codes (U.S. Deptarment of Energy)

• CABO, The Council of American Building Officials

• Canadian Commission on Building and Fire Codes

• Canadian Construction Research Board

• Commercial Building Incentive Program - OEE, Canada

• Federal Interdepartmental Facility Management Association

• GSA, U.S. General Services Administration

• HUD USER

• Hope's Windows, Inc.

• ICC, International Code Council

• IRC, The Institute for Research in Construction, National Research Council Canada

• NCSBCS, National Conference of States on Building Codes and Standards

• NIST, National Institute of Standards & Technology

• PK Architecture

• PWGSC, Public Works and Government Services Canada, Selling to the Government of Canada

• Rural Housing Service

• US Army Engineer Research and Development Center

• USGS National Center