The U.S. Department of Energy (DOE) is seeking proposals from manufacturers interested in its R-5 Window and Low-E Storm Window Volume Purchase Program.
The deadline for submission is February 19, 2010.
Final specifications call for a U-factor of .20 or below for fixed windows and .22 or below for operable units. The specifications also require an air leakage rating of 0.30 or below.
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