A high coefficient (up to 1.00) means high solar heat gain. The smaller the number, the better the window is at preventing solar heat gain. Solar heat gain is the amount of solar radiation that enters your home through a window or door.
A high coefficient (up to 1.00) means high solar heat gain. The smaller the number, the better the window is at preventing solar heat gain. Solar heat gain is the amount of solar radiation that enters your home through a window or door.