Low-E glass, also known as low-emissivity glass, is a product that has a film coating applied to its surface made up of multiple layers of metals or other compounds. The coating has the characteristic of high transmittance for visible light and high reflection for mid- to long-wave infrared radiation, which makes it superior in heat insulation and light transmittance compared to ordinary glass and traditional architectural coated glass. What is the difference between high-transmission LOW-E glass and ordinary LOW-E glass?
1. The metals used in the coating are different. Both are produced by vacuum magnetron sputtering process, where a metal or a compound of metal and other elements is coated on the glass surface. In general, ordinary LOW-E glass mainly consists of metal oxides, nitrides, etc., while high-transmittance LOW-E glass, in addition to these, will also be coated with a layer of silver metal. High-transmittance LOW-E glass can achieve high transmittance of visible light while having high reflection of mid-to-far infrared light, which also leads to better reflection of solar radiation by high-transmittance LOW-E glass compared to ordinary LOW-E glass.
2. The energy-saving effect is different. The energy-saving effect of high-transmission LOW-E glass is very good. The energy-saving effect of ordinary LOW-E glass is relatively insufficient, because ordinary LOW-E glass can only show good energy-saving effects when the sun radiation is strong, that is, the best is during the day in summer, while in winter or at night without sun radiation, the role of ordinary LOW-E glass is almost the same as that of ordinary glass.