solar heat gain coefficient (SHGC)

[10.5.9.5]

The fraction of incident solar radiation that is admitted through a window or skylight, both directly transmitted and absorbed, and subsequently released inward. SHGC can be expressed as a number between 0 and 1 for the glass area alone or for the whole window assembly.

NOTE: This term was added in RP-16-17 Addendum 2.

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