Yes! Vista Window Film will only enhance your Low E Windows. Vista will reject 99.9% UV rays. This is well above the UV rejection offered by the market’s most efficient Low E windows. There are two basic types of low E glazing systems. One of these is a conductive coating put on glass as it is being made. It gives some heat loss reduction, but does little to reduce heat gain into a building. The second type is a more complex system of multiple layers of metals and conductive coatings deposited on glass after it has been made. This type of low E glass gives some heat reduction, but still nowhere near the level that Vista Window Film can achieve. By adding Vista Window Film to your Low E Windows you can better control solar heat gain, control glare, prevent heat loss, reduce fading, or simply enhance the safety of your windows.