Pella Impervia - Glass Package

Advanced Low-E Insulating Glass with Argon SunDefense Low-E Insulating Glass with Argon
Features insulating glass with a Low-E coating made from two layers of thermal protection to increase comfort year-round. Features insulating glass with a special SunDefense Low-E coating made from three layers of thermal protection that reflect more of the sun's heat to keep your home cooler in the summer. Also available with SunDefense Dual Low-E with argon.
Fade protection - Blocks up to 86% of the sun's ultraviolet rays to help protect furniture, window treatsments and flooring from fade damage - yet it still allows natural light in. Fade protection - Blocks 95% of the sun's ultraviolet rays to protect furniture, window treatments and flooring fade damage - yet it still allows natural light in without spoiling the view like room-darkening tints.
Argon - this gas is inserted in the space between the two panes of glass to further reduce heat transfer, making your home even more energy-efficient Argon - this gas is inserted in the space between the two panes of glass to further reduce heat transfer, making your home even more energy-efficient