Low E Window Glass
Low e glass uses a coating on the exterior of the glass pane that lets in long wavelengths (sunlight) and reflects short wavelengths (heat). Low-e glass coatings are made from metallic particles and should not be confused with a tinted glass that simply changes the color of the glass. The density and consistency of the low-e e coating can change how much sunlight and/or heat is allowed through the pain. Window manufacturers can use one or more coats of low E glass, alter how the layers are stacked or add tinting to affect the amount of light let in, the amount of heat let in, the amount of UV rays and more.
More On Low E Glass