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Essay:
Spectrally selective glazing"Spectrally selective glazings are designed specifically to admit a higher level of visible light while still controlling solar heat. They do so by responding differently to different wavelengths of solar energy allowing for much clearer glass with good solar control. Spectrally selective glazings are available with a range of performance characteristics. This provides a high level of design flexibility as different coatings and performance characteristics can be selected for each orientation providing optimal solar control while maintaining a uniform appearance. Popular ˇ°low-emissivityˇ± or ˇ°low-eˇ± glazings are a type of spectrally selective glazing that is typically selected to provide enhanced insulation value, good visible transmittance and good solar control. Some low-e windows, however, can allow more solar heat to penetrate than others so it is important to evaluate glazing options against all of a project's design criteria." (source: http://www.aps.com/images/pdf/Windows.pdf)
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