What does SHGC stand for in windows?

SHGC stands for Solar Heat Gain Coefficient. It measures the amount of solar radiation that passes through a window, including both the direct sunlight and the heat that is absorbed and subsequently released. The SHGC is expressed as a number between 0 and 1, with lower values indicating better performance in reducing heat gain from sunlight. This metric is important for energy efficiency, especially in managing indoor temperatures and reducing cooling costs.