Friday, May 16, 2008

Energy Efficiency and Hurricane Windows – Part III

We will continue our energy efficient series by providing key facts to know about Energy Star® windows and doors. The Department of Energy and the Environmental Protection Agency developed an Energy Star® designation for products that meet certain energy performance criteria. Recognizing that these
criteria could not be the same for all of the areas of the United States, the Department divided the country into four zones:

Northern Zone (mostly heating necessary)
Central Zone (both heating and cooling necessary)
Central South Zone (both heating and cooling necessary)
Southern Zone (mostly cooling necessary)

Since this blog specializes in hurricane impact resistant windows and doors, we will concentrate on the Southern Zone, which includes Florida.

For the Southern Zone region, the Department of Energy recommended that windows should have a Solar Heat Gain Coefficient of 0.40 or less as this factor is the most important window property in warm weather. In addition, the Department made a recommendation regarding U-factors. They sustain that while a low U-factor is useful during cold days when heating is needed, a low U-factor is also favorable during hot days. As a result, they suggest a U-factor no greater than 0.65 on these warm regions.

Hurricane windows and doors that meet or exceed the criteria above are considered Energy Star® windows and doors.

Visit Astor Impact Windows for information about purchasing impact windows and doors. You can also email us at or call us at 1-800-573-1780.

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