Cottage Grove, Minn (September 17, 2008) - Renewal by Andersen, the start-to-finish window replacement subsidiary of Andersen Corporation, has expanded its available glass options with a new glass that helps blocks the sun's heat, while letting in almost as much natural daylight as clear glass.

High-Performance^TM Low-E4® SmartSun^TM glass is Renewal by Andersen's most energy-efficient glass offering ever, up to 70% more energy efficient in summer as compared to ordinary dual pane glass* and has Renewal by Andersen's highest energy efficiency rating in cool weather. What's more, SmartSun glass also blocks an amazing 95 percent of harmful UV rays, helping to protect furniture, carpets and wall coverings.

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*Values are based on comparison to U-Factors and SHGCs for clear glass non-metal frame default values from the 2006 International Energy Conservation Code (IECC).