Low E Glass Explained from TR Window Services

What are Low-E Coatings?

Low-emissivity (low-E) coatings were created to counteract the naturally high-emissivity of characteristics of glass. In essence, low-e coatings act as a thermos would for your coffee cup; it helps control where to keep the heat, either indoors in the winter or outdoors in the summer.
Low-E coatings are thin, invisible layers applied to the glass or suspended films of an energy efficient window. The coating works by reflecting back heat to its source. In the winter, the heat is reflected back into the house. In the summer, the sun’s excess heat is reflected back outside. Low-E coatings are unique in that they block long-wave infrared heat and UV rays without preventing visible light from passing.