Low Emissivity Coating Helps to reject the heat from the sun back out to where it came from and from the house. One of the benefits of using Low-E coating is, you get as much as a 99% reduction of ultraviolet light penetrating through your window. Low-E coating comes in two different levels of coatings; (1) a double coat and (2) a triple coat. The Low-E coating has more of a green hue to it that signifies an energy-efficient window. Talk to us, and include us in your project!