Windows: SWS DuraGard XT Vinyl
Information from www.swscorp.net

The DuraGard XT family of windows has been engineered to meet today's tough energy standards as well as being designed for aesthetic appeal. SWS manufactures the DuraGard family to the highest quality for years of worry-free use. All of the DuraGard products are constructed using the finest materials on the market today. SWS chooses to use superior performing components, like Guardian's ClimaGuard RLE for our Low E option. The ClimaGuard RLE Low E is technologically advanced to provide superior efficiency while providing natural views. SWS insulates the ClimaGuard Low E with Super Spacer®, a true Warm Edge Spacer. Super Spacer is manufactured using an all foam formula which provides a significant energy advantage to metal spacers that conduct cold. All of our DuraGard products meet Energy Star Requirements. The DuraGard XT family is available in either new construction or replacement styles.

Some of the features that make it the best are:

National Association of Home Builders Energy Star Chamber of commerce Builders Association of Central MA