Low-E glass
High-performance Low-E insulating glass lowers energy costs, helps homes stay cooler in the summer and warmer in the winter, prevents fading of interior furnishings, and reduces condensation. Windows and patio doors with Low-E glass are also ENERGY STAR® qualified, which means they exceed the minimum energy efficiency criteria for the climate region you live in (by as much as 40 percent).
LoĒ³-366 glass
This glass features three transparent, microscopic layers of silver placed between layers of anti-reflective metal oxide coatings. These coatings block 95 percent of harmful UV rays and reduce window heat gain by 64 percent. It exceeds ENERGY STAR requirements-even in Northern regions-and will lower energy costs by 35 percent.
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LoĒ³-366 is a spectrally selective coating. It distinguishes between visible light, unwelcome UV and near infrared rays (NIR). The result is the ultimate in solar heat control, fading protection and visibility.
This table compares the interior glass temperatures of different glass types in two outdoor conditions.
Dual Low-E
This feature is recommended for homes located 4,000 feet above sea level (or higher). It brings together the strengths of both high-altitude and energy efficient glass. Since high-altitude glass includes capillary tubes, it cannot accommodate the added insulation of Argon gas (due to the risk of glass breakage). But Dual Low-E adds insulation in a different way—an additional pane of glass on the interior with a hard Low-E coating—while still including capillary tubes to equalize air pressure.
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