ENERGY STAR helps you meet and exceed energy-efficient standards to make your building or renovation purchases easier and long-lasting. Learn how you can save money, energy and the environment with a simple window replacement.

Better Window Insulation An Envirosealed window or door with the Duralite insulating glass spacer is designed to trap air inside small, sealed chambers, which act as insulating pillows of air that reduce energy loss. This can reduce energy costs and improve the energy efficiency of a window by as much as 10 percent.
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Duralite Window Spacer The Duralite insulating glass spacer is a composite laminate design that optimizes the use of a number of spacer components--a warm edge polycarbonate spacer that traps air pockets between its corrugations, a 3-sided continuous foil moisture barrier that's impermeable to gas and water vapor, a moisture-resistant bondline adhesive and an encapsulated desiccant to keep your windows clear, longer, while increasing energy savings compared to other types of insulating glass spacers (available in black or gray).
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