Regular Low-E vs. Superwindow

The window on the left is a double glazing with low-E and an insulating spacer. The window on right also uses low-E and a partially insulating spacer. The difference is that on the right the window uses three different low-E coatings in a quadruple layer design and the air inside the panes has been replaced with more insulating krypton gas. Such a high performance window is called a "superwindow". These windows are being cooled on the back side with wind at -17.8°C (0°F).

For more information contact:

Howdy Goudey
Building Technologies Program
510-486-6046 (fax)

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Building Technologies | Energy & Environment Division | Lawrence Berkeley National Laboratory

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