Save energy and money. Add low-e film to your windows.

Time: 
Morning

Save energy and money by adding low-e (low-emissivity) film to your windows. The film reduces solar gain, the heating of an area due to the sun's radiation. The key is to use films with a solar heat gain coefficient of 0.55 or less (the lower the better). Many films can be removed in the winter, and their installation is far simpler than replacing all your windows.