Is NFRC working on any additional energy performance ratings?
Yes. Right now, fenestration manufacturers can rate the U-Factor, solar heat gain coefficient (SHGC), visible transmittance (VT), air leakage (AL), and condensation resistance (CR) of their products through the NFRC system. The Council has also developed rating and labeling procedures for window film attachments, internal or between the glass blinds and shading devices, and dynamic glazing products that change tint in response to temperature, sunlight, or electric charge. The Certified Products Directory is expanding to include these ratings as they become available. NFRC is currently considering such energy ratings as ultraviolet light/fade protection, and overall comfort.
