Solar Heat Gain Coefficient
A measure of how much solar radiation passes through a window—expressed as a number between 0 and 1.
Why It Matters for Homeowners
SHGC is critical in sunny climates like Southern California. Lower SHGC (0.25 or below) blocks more solar heat, reducing cooling costs. West and south-facing windows benefit most from low SHGC ratings.
Related searches: SHGC, solar heat gain, window solar rating