Why Windows Matter

Although they constitute only 10% of the surface area of a typical home, traditional windows are poor energy performers. Windows usually account for 30-40% of the heat loss in winter and often add to cooling peaks and discomfort in summer.

As the U.S. prioritizes net zero energy buildings, addresses carbon emissions and confronts the challenges of decarbonizing the grid, there is a pressing need to dramatically increase the availability and use of highly efficient window products. Switching from today’s code compliant, double pane low-e window in a new home to new R5 solutions can save 7-16% of a home’s energy use, depending on climate. In an older home, retrofitting its single glazed windows with R5 windows can provide much larger energy savings.