By Special to the Town Crier

Replacing old windows with more energy-efficient models is one of the more popular improvements homeowners can make - and there’s a wealth of information on the Internet that can help you make your purchasing decision.

Unfortunately, the search for windows on the Internet can give you listings of hundreds of new computer products. The following is a list of unbiased and informative Web sites.

www.efficientwindows.org - This site is sponsored by the Efficient Windows Collaborative with support from the U.S. Department of Energy’s Windows and Glazings program. The site has an interactive section that allows consumers to calculate energy savings in their home’s specific geographic region with various kinds of window options.

www.nfrc.org - The National Fenestration Rating Council, a non-profit organization, provides ratings on windows, doors and skylight products. These ratings are listed on an NFRC label on windows, and enable consumers to compare one product with another, based on thermal performance, air leakage and condensation resistance.

www.energstar.gov/products/windows - The Energy Star program indicates the energy efficiency of thousands of products including appliances, windows, lighting, consumer electronics and residential heating and cooling equipment. Visit the site to learn more about the program’s products.

www.cutter.com/energy/reports/windows.htm - A site where you can order a book that answers hundreds of questions about energy efficient window technologies.

www. warmair. com - calculate the energy savings gained by replacing your windows with double or triple pane insulating glass.

www.superspacer.com - Gain an appreciation of what Low-E glass and Warm Edge Technology can do; learn about the benefits of high-performance insulating glass.