what is a good solar heat gain coefficient, shgc
Solar Heat Gain Coefficient (SHGC) Solar Heat Gain Coefficient, or SHGC, is the amount of solar radiation, or heat, that passes through windows into the home. In other words, SHGC tells you how well the windows block the sunâs heat from coming inside. An SHGC closer to 0 means that little solar heat is let in.