Low-E (Low Emissivity) Coatings
Relatively neutral in appearance, low-E (low emissivity) coatings reduce heat gain or loss by reflecting long-wave infrared energy (heat) and therefore decrease the U-Value and improve energy efficiency.
Low-E glass for improved comfort and energy efficiency
Low-E (low emissivity) coatings reflect heat (both solar and ambient) in order to help to keep a building, office or home cool in the summer and reduce heat from escaping through the glass in the winter. The objective of a low-E coating is to improve comfort while reducing energy costs.
Windows with low-E coatings reduce the amount of heat transmitted through the glass. The coatings are made up of a series of almost invisible layers of various materials and rely on one or more precious metal layers (e.g. silver) to reflect exterior and interior heat.
As well as reflecting heat, low-E coatings can also reduce fading by partially reflecting damaging UV-rays and acting as a sunscreen for artwork, furnishings and floors. Current sputter-coated low-E coatings are multi-layered, complex designs engineered to provide high visible light transmission, low visible light reflection and reduce heat transfer. High-solar-gain low-E coatings and low-solar-gain low-E coatings are the two main types.