Low-E glass - Printable Version

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Low-E glass - fdaforum - 08-14-2014

Low-E glass

Is an innovative coated glass that prevents heat from escaping during the winter and reduces the amount of heat that enters a building in the summer. It is used widely in residential, commercial and industrial applications. Similar to solar reflective glass, low-emissivity glass (commonly known as low-e glass) relies on special coatings to achieve its high performance in principle. Low-E glass is able to selectively reflect the invisible long-wave infrared or heat while letting the visible light in.

The low-e coating allows for exceptionally high visible light transmission of up to 70% as compared to 79% in clear glass while sustaining high performance in solar insulation by reducing infrared transmission and solar heat gain. The use of low-e glass can substantially reduce the heat gain within a building and hence its energy consumption for air-conditioning. Low-E coating on tinted glass would reduce glare and improve its thermal performance.

DGU (DOUBLE GLASS UNITS ):

low-e glass can also be used in DGU units. When short-wave infrared energy strikes the tinted exterior ply glass, it is absorbed and converted into long-wave infrared or heat.

By applying a low-e coating to the second surface of the DGU unit, the heat is re-radiated back to the exteriors, thus reducing the heat gain potential into the building interior.

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