The National Fenestration Rating Council (NFRC) is a 501(c)3, non-profit organization that provides performance ratings on windows, doors, and skylights. NFRC administers a certification and labeling program for the energy-efficiency of windows, doors, and skylights.

NFRC helps determine how well a product performs. By using the information contained on the NFRC label, architects, builders, code officials, contractors, home owners, and specifiers can do the following:

• Reliably compares one product with another
• Make an informed fenestration product choice
• Trust that a product will perform as advertised
• Determine whether a product meets code