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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Learn Ways to Cut Energy Costs
There are many other ways to reduce your energy bills. Here are some tips on how to calculate the savings you'll get by using more energy-efficient windows.
Replacement Windows Savings