Energy-saving window films are thin sheets that attach to windows in a building similar to how window tint is put onto cars. The film's main purpose is to reduce heat transfer which in turn will reduce the consumption of heat or air conditioning
The video to the left [11] shows how easy it is to install these films. After cleaning the window, you start by spraying the window with water and carefully applying the film over it. Next, use a squeegee to get all of the water and air bubbles out of the window to ensure a smooth finish. Lastly, trim the edges for a clean look.
This technology works by insulating the window, or in more technical terms, it decreases the heat transfer between the inside room temperature and the outside air temperature. The image above [10] shows how solar energy transmission into the inside room decreased by 76% with the film. Depending on the season, these films can drastically reduce the heat or air conditioning consumption of buildings with large windows. In dorm buildings or offices where the temperature needs to be comfortable for humans to spend long periods of time, these films can play a crucial role.
A Revision of UD's Buildings by Eli Cameron, Khalil Darouichi, Marc Giordano and Evan Kimble is marked with CC0 1.0