Basics Behind SHGC
SHGC stands for solar heat gain coefficient and is a measure of how much heat is allowed through a window. For example, clear glass that has no low E coating will allow much of the solar heat in. This is not necessarily a bad thing, but there are many instances when you need the window to reflect more of the heat than absorb through the glass. Low E window glass is a coating that goes over the window pane and can control the amount of heat that is let through the glass.