"We want to thank Suburban Construction for commendable service. More than nine years ago, we had Suburban replace all the windows in our home with replacement windows, insulated with low e Argon gas.... » more
- Don and Mary Schaefer Bettendorf, Iowa


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Solar Heat Gain Coefficient (SHGC)

The fraction of solar radiation admitted through a window or skylight, both directly transmitted and absorbed and subsequently released inward. The solar heat gain coefficient has replaced the shading coefficient as the standard indicator of a window's shading ability. It is expressed as a number between 0 and 1. The lower a window's solar heat gain coefficient, the less solar heat it transmits and the greater its shading ability. SHGC can be expressed in terms of the glass alone or can refer to the entire window assembly.

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