Solar Heat Gain Coefficient - SHGC Law and Legal Definition

According to 10 CFR 434.201 [Title 10 Energy; Chapter II Department of Energy; Subchapter D Energy Conservation; Part 434 Energy Code for New Federal Commercial and Multi-Family High Rise Residential Buildings; Subpart B Definitions], the term solar heat gain coefficient (SHGC) means “the ratio of the solar heat gain entering the space through the fenestration area to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation, which is then reradiated, conducted, or convected into the space.”