How Are Windows Rated?
What you need to know...
Unwanted heat losses and gains through windows waste up to 30% of all energy used to heat and cool buildings in this country, according to the Lawrence Berkeley Laboratories.
Dual Pane Insulating Glass units are the heart of the best residential windows.
But how are windows rated?? By manufacturer members who belong to the National Fenestration Rating Council or NFRC.
NFRC is a non-profit organization that administers the only uniform, independent rating and labeling system for the energy performance of windows and doors. Their goal is to provide fair, accurate and reliable energy performance ratings.
Click here to learn how their performance label, found on every Simonton Window product, can help you make an informed decision in your search for the greatest energy efficient window for your investment dollar.