The National Fenestration Rating Council (NFRC)
What is the National Fenestration Rating Council (NFRC)?
The NFRC is a non-profit organization that provides fair and accurate window labeling and ratings based on energy efficiency and performance. Windows that are certified by the NFRC have undergone several quality inspections and energy efficiency tests. Certified windows are adorned with a label depicting the most important window performance information.