If it doesn't have the label, it isn't NFRC certified.
With more than 35 years of expertise, NFRC is the standard-bearer in fenestration performance certification, providing the public with objective data that helps stakeholders make informed decisions about product and building performance. NFRC certification ensures that products are tested using precise, scientifically validated methods, resulting in ratings that are fair, accurate and credible.
What does the NFRC label tell you?
The NFRC label helps you compare between energy-efficient windows, doors, and skylights by providing you with energy performance ratings in multiple categories.
U-Factor
Visible Transmittance

Condensation Resistance
This measures a product’s resistance to condensation. The higher the number, the better a product resists condensation.
Solar Heat Gain Coefficient
Air Leakage
Solar Heat Gain Coefficient (SHGC)
This measures how well a product can resist unwanted direct or indirect solar radiation. In summer months, a low solar heat gain coefficient helps to keep your home cool. In winter months, a higher solar hear gain coefficient can help to keep your home warm.

U-Factor
U-Factor measures how well a product can keep heat from escaping from the inside of a room. The lower the number, the better a product is at keeping heat in.
Range: 0.00-2.00
Label Certificates are used in commercial buildings and are project-specific. They include the address and contact information for the project as well as the certified ratings.

NFRC and ENERGY STAR
NFRC is the official certification body for ENERGY STAR® windows, doors, and skylights. NFRC provides objective 3rd-party ratings for energy performance. Products that meet the ENERGY STAR performance requirements qualify for ENERGY STAR certification through NFRC.

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