The modeling was measured against high-performance double-paned windows that employ a standard low-emissivity glass coating. Researchers measured glass and frame surfaces to compare and calibrate measurements with models created using Lawrence Berkeley National Laboratory’s WINDOW and THERM software. For this study, Alpen’s high performance quad-pane windows (half quad-pane windows with suspended film and half quad-pane windows with thin glass center panes that are four to six times lighter than typical glass used in traditional triple pane glass units) were installed in the building, all with super-insulating fiberglass frames. Department of Energy’s National Renewable Energy Laboratory evaluated Alpen’s quad-pane windows at GSA’s Denver Federal Center Building 41 in Denver, Colorado. The use of thin glass, similar in thickness to that used in flat screen televisions, or suspended film as the center pane(s) can significantly reduce overall window weight and structural requirements. Until now, windows with R-values of 5 or greater have been made with triple panes of standard glass, making them typically thicker, heavier and substantially more expensive than traditional dual pane window units. The windows were tested and evaluated as part of GSA’s Green Proving Ground (GPG) program, which uses GSA's real-estate portfolio to evaluate innovative and high-potential, sustainable building technologies that reduce energy in federal buildings.ĭouble-pane windows have been the industry standard for the last several decades in federal buildings. ![]() ![]() General Services Administration (GSA) has finalized and published the results of its nearly year-long testing and evaluation of quad-pane windows manufactured by Alpen. (PRWEB) December 07, 2021ĪLPEN HIGH PERFORMANCE PRODUCTS INC., a Colorado-based, longtime industry leader and manufacturer of commercial and residential ultra high performance windows, announced today that the U.S.
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