Wholesale window films glossary

Glossary

Product information: A list of Window Film definitions

Visible Light Transmittance
The percent of total visible light that is transmitted through the window film/glass system.

Total Solar Transmitted
The percent of incident solar radiation that is transmitted through the window film/glass system.

Total Solar Reflected
The percentage of incident solar radiation that is reflected by the window film/glass system.

Total Solar Absorbed
The percent of incident solar radiation that is absorbed by the window film/glass system.
The lower the number, the less solar radiation absorbed

Total Solar Energy Rejected
The percent of total solar energy (heat) rejected by the window film/glass system.
The higher the number, the more total solar energy (heat) rejected.

UV Rejected
The percent of solar ultra-violet light rejected by the glazing system

Shading Coefficient
The ratio of solar heat gain passing through window film to the solar heat gain that occurs under the same conditions if the window were made of clear, un-shaded double strength window glass.
The lower the number, the better solar shading qualities of the window film/glass system.

Emissivity
The measure of a surfaces ability to absorb or reflect far-infrared radiation. The lower the
emissivity rating, the better the insulating qualities of the window film/glass system.

“U” Value (mild winter)
The ability for heat to transfer through 1sq. ft. of window film for each 1 F difference in
temperature. It is dependent upon the local climate or environment that the window is located
in effects the level of heat transfer and the rate: in winter, heat transfers from the indoor air to the outdoor. The lower the U-value, the better insulating qualities of the window film/glass system.