What SHGC Rating Is Best for Windows in Texas Climate Zone 3?
How Solar Heat Gain Affects Windows In Texas SHGC stands for solar heat gain coefficient, and it measures how much solar heat a window lets into the house. A lower SHGC means less solar heat comes inside. For much of Texas climate zone 3, especially homes with west and south exposures, solar heat control is one of the fastest ways to make glass feel less punishing. A window with the wrong SHGC can turn a room into a heat trap by late afternoon. An experienced windo