Solar Heat Gain Coefficient

What is the Solar Heat Gain Coefficient?

As most homeowners know, direct exposure to the sun can cause an interior space to warm dramatically. The Solar Heat Gain Coefficient is the measure that shows what percentage of the sun’s heat falling on glass penetrates inside the room (directly and multiply). The lower the Solar Heat Gain Coefficient the more heat a window is able to block. Depending on where a window and a home are located, a homeowner may desire glass with either a higher or lower Solar Heat Gain Coefficient.