superwindow, definition of

Superwindow

One of the new generation of glazing technologies, superwindows are double or triple-glazed window sandwiches which contain a center sheet of coated mylar "low-emissivity' film and are filled with argon or krypton gas. This construction and the coatings on the film allows short-wave radiation (visible light) to pass through, but reflects long-wavelength radiation (infrared or heat) so heat can- not pass through. R-values of 4.5 or more are achieved.

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