Q. What is "low-e" window film?
A. "Low-e" is short for "low emissivity". Low-e films absorb and emit relatively low levels of radiant thermal energy. Therefore, low-e films mainly reflect radiant thermal energy back to its source, keeping the heat on the same side of the glass from which it originated (keeping heat out in the summer and in during the winter), while letting visible light pass through.
Q. How much difference does an extra pane of glass make?
A. Quite a bit. A double-pane window is thermally insulated by a gas trapped between two panes of glass, and effectively doubles the insulating performance of a single-pane window. To get that same kind of insulating power from a thin, transparent window film added to single-pane glass is impressive - and a lot more affordable.
Q. What are "UV" rays?
A. "UV" refers to ultraviolet light, that invisible and unhealthy radiation just beyond violet in the visible spectrum. UV rays contribute to fading of interior furnishings.
Q. What is "R-Value"?
A. In the construction industry, "R-Value" measures thermal resistance or how well a material blocks heat. The larger the number, the better the insulating performance.
Q. What is "U-Value"?
A. "U-Value" measures the rate of heat passing through a material. A higher number indicates more heat passing through.