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Spectrally Selective Glass

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High Performance Windows

High performance windows know what kind of light to let into a home and what kind to keep out to decrease fabric fade, let in light without tint, and keep the home cooler in the summer and warmer in the winter. These windows are also known as spectrally selective glass with low-emissivity (LoE) coating.

The sun’s light can be divided into three types of light: Ultraviolet, Visible Light and Infrared Light. Here’s how these three kinds of light work with high performance windows.
  1. Ultraviolet (UV) light cannot be seen, but it is what causes furnishings to fade. High performance windows block about 75% of these rays protecting curtains, fabrics, furniture, artwork and other valuables from fading.
  2. Visible Light is all the light you can see. High performance windows let in about 90% of visible light without visible tint.
  3. Infrared light can’t be seen, but is felt as heat. In the summer high performance windows reflect much of the sun’s infrared energy back outside, providing a significant reduction in air-conditioning loads. In the winter, high performance windows reflect the furnace’s heat back into the home, lowering heating costs. The home is cooler in the summer, warmer in the winter.
Benefits to Buyers
  • Reflects the sun's heat in the summer
  • Reduces heat loss in the winter
  • Blocks 75% of the infrared and ultraviolet solar energy that causes fabric fade
  • Lets in nearly all visible sunlight without tint
  • Lowers utility bills