Keystone's NFRC Certification Program
Keystone is a National
Fenestration Rating Council (NFRC) licensed Inspection Agency (IA). The
NFRC Certification Program offers fenestration (window and door) manufacturers
a third party verified, nationally-recognized method for demonstrating product
U Factor, Solar Heat Gain Coefficient (SHGC) and other energy performance
characteristics.
Fenestration product NFRC thermal performance ratings are specified by the International Code Council (ICC) building codes, including the "International Residential Code" (IRC), the "International Energy Conservation Code" (IECC), and the "International Building Code" (IBC). Code-required thermal performance varies depending on climate.
NFRC ratings and certification are also used to demonstrate compliance with the US EPA's ENERGY STAR® Windows Program and other utility and tax rebate program requirements.
A Getting Started Checklist is available for fenestration manufacturers looking for more guidance in certifying thermal performance. For more specific guidance, follow the contact us links at the bottom of this page.