WASHINGTON--(BUSINESS WIRE)--Homeowners may continue to enjoy their single pane glass windows and gain energy efficient advantages for up to 80 percent less than the cost of new replacement windows with the professional installation of window films instead, according to the International Window Film Association (IWFA). In cooperation with the National Fenestration Rating Council (NFRC), the independent agency responsible for determining how well a glazing product will perform the function of en
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