Example of an NFRC Sticker

This is an example of an NFRC sticker. The NFRC is the only federally recognized organization for determining the energy efficiency of windows & doors. As you can see this window would not qualify because the U-Factor & SHGC (Solar Heat Gain Co-Efficient) numbers are too high. You can get great information about what these numbers mean at http://www.efficientwindows.org/