This year, the National Fenestration Rating Council (NFRC) is celebrating its 35th anniversary. NFRC was founded to serve the public interest by providing fair, accurate, and credible ratings on the energy performance of fenestration products.
This year, the National Fenestration Rating Council (NFRC) is celebrating its 35th anniversary. NFRC was founded to serve the public interest by providing fair, accurate, and credible ratings on the energy performance of fenestration products.