New Product: Dynamic, High R-Value Triple-Pane Glazing
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According to the U.S. Department of Energy, increasing a window’s R-value from 3 to 5 reduces average heat loss through the window by 40%. An R-value of 7.35 for SAGE’s dynamic triple-pane glazing equates to a 50% reduction in energy consumption over clear, single pane glazings and a 16% reduction compared to state-of-the-art, static, high-performance triple-pane glazings.
Researchers at the DOE’s National Renewable Energy Laboratory have said that full deployment of dynamic, high R-value windows can save up to five percent of the U.S. energy budget. This potential energy saving is equivalent to over 160 gigawatts of electricity generated annually by fossil fuels, and could result in a 300 million metric ton reduction in CO2 emissions.
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In heating-dominated climatesMinnesota is a good exampleof particular value is a window that cannot only modulate the incident sunlight, but which also is constructed to keep as much heat as possible inside the building during the cold winter months.
SAGE’s dynamic, high R-value glazing is the most energy-efficient solar control solution on the market, achieving R-values greater than 8 when krypton gas is used to fill the space, and greater than 7 when argon is used (U-factors of 0.12 and 0.14, respectively). By comparison, the best high performance, low-e, double pane insulating glass units (IGUs) have a center-of-glass R-value less than 4 (U-factor of 0.25). SAGE offers its dynamic, triple-pane insulating glass units in many configurations to suit a variety of applications. For a chart with detailed specifications for many of SAGE’s triple-pane products click here.
Energy and Emissions Modeling
A comparison between a dynamic SageGlass triple-pane glazing and three static glazings was carried out by Paladino and Company for both a northern climate (Minneapolis) and a mixed climate (Washington, DC) based on a typical U.S. office building. Modeling was carried out per the ASHRAE 90-1.2007 national energy standard. Highlights are shown in the charts below. The triple-pane SageGlass glazing used in the comparison is argon-filled with 6 mm glass, 12.6mm stainless steel spacers, SageGlass lite on the exterior, a low-e lite on the interior, and a clear glass lite in between. Modeling results for all windows with the exception of the single-pane glazing included daylighting controls and the use of manually operated blinds.
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