By significantly reducing heat loss, high performance thermal insulated glazing enhances the energy-efficiency of windows. Low-E coating is an almost invisible film of metal or metal oxide layers deposited on a window or skylight. It reduces U-factor by restricting radiative heat flow. Heat is transferred in multilayer glazing by way of thermal radiation from a warm sheet of glass to a cooler sheet. Covering a glass surface with a low-emittance element and placing that coating into the gap between the layers of glass helps in impeding the radiant heat transfer. This restricts the flow of heat through the window.
One of the biggest benefits of Low-E Glass is that it helps minimize the direct and indirect heat gain through the facade. Under different weather conditions and climate zones, it helps eliminate glare through the year. The coating on Low-E Glass is especially useful in reducing hazardous ultraviolet (UV) light. In colder climates, the interior heat tends to travel to the colder exteriors, but the coating on Low-E glass helps reflect the heat back inside, reducing radiant heat loss. In warmer climate zones, the coating prevents exterior heat from coming indoors. Therefore, Low-E Glass is equally relevant in both cold and warm climatic conditions. It complies with Green rating norms, contributing to sustainable structures. The functional metallic coating allows higher visual light transmission while reducing solar heat gain — ensuring increased energy efficiency, cost reduction, better clarity, and improved occupant comfort.
