Every consumer needs to be aware of the dramatic ability of some very special window products that can save you significant amounts of energy, while adding aesthetics, convenience and comfort to your home. The United States Department of Energy has created a program to promote very high-performance products for use by homeowners as well as commercial building owners. It is not well known, nor well publicized, but this is really a valuable program to the consumer. Here is a link that explains the details of the program: http://www.windowsvolumepurchase.org/ This R5 program goes well beyond the Energy Star performance requirements for really dramatic energy-saving results. It is designed to help you get the best-performing windows available today, at affordable prices. Gorell Windows & Doors is one of the select manufacturers approved by USDOE to participate in the R5 volume purchase window program. We at Gorell are constantly striving to improve on the already excellent energy savings performance we offer. We are looking for more products, more options and more ways to help you save energy and enjoy your home more.