Inline Fiberglass is proud to announce that its high-performance windows were recognized for their superior performance in the 2005 Solar Decathlon, a solar-powered home competition primarily sponsored by the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory. The event was held in Washington, D.C. and international in focus given the participation of university design teams from Canada and Spain as well as the United States.

The Inline Fiberglass Solar Decathlon project featured distinctive yellow frames, emphasizing the color-design freedom represented by fiberglass. Very low thermal conductivity, dimensional stability under temperature cycling and longevity are also characteristics of Inline Windows.

The glass for these Decathlon Inline Windows was provided by Alpen, Inc. in Boulder, Colorado. It is believed to represent the highest in insulating value ever produced. At an "R-value" of 15 and with the weight of only double glazing, it would take fifteen panes of standard glass to achieve this insulating value. The performance of Alpenglass is achieved through a combination of suspended coated films and krypton gas-filling.