Most Efficient 2013 Program
Mercury Excelum is a proud participant in the U.S. Department of Energy's volume purchase program for R-5 windows. Mercury Excelum "R-5 windows"—highly insulating windows with a whole-window R-value of 5 (a U-value of around 0.2)—are some of the most thermally efficient windows available today. Vinyl replacement windows from Mercury Excelum are designed specifically to provide you with windows that lower your home energy bills and make your home significantly more comfortable to live in.
What is an R-5 Window?
What is an R-value and U-factor?
What Mercury Excelum products currently qualify for the R-5 volume purchase program?
Mercury Excelum Harmony Series Triple Pane Windows including
How do I purchase Mercury Excelum R-5 Windows?
Mercury Excelum, Inc, is proud to offer our customers products with the ENERGY STAR label.
State of the art spacer technology offers superior window performance
Envirosealed Windows Advantage is an extension of Truseal’s award-winning Envirosealed Windows™ program. Envirosealed Windows™ have the most energy-efficient spacer as measured by their u-value and edge of glass temperatures. With Envirosealed Windows Advantage you build a window with the most energy-efficient spacer, glass pack and frame to produce the best thermal performance and most energy efficient.
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