Low-E Glass
LOW-E Glass: Low-emission glass (Low-E) is a clear glass, it has a microscopically-thin coating of metal oxide. This allows the sun's heat and light to pass through the glass into the building. At the same time it blocks heat from leaving the room, reducing heat loss considerably.
Production On-line coated (Pyrolitic process): this is a clear glass which has been coated with a metal oxide through pyrolysis when the glass leaves the tin bath (at 650°C). The coating is therefore very resistant to mechanical damage, and this Low-E glass can be cut, tempered or laminated just as normal uncoated glass.
Production Off-line coated (magnetron process): is a clear glass which has received, on one of its faces, a silver coating applied by magnetically-enhanced cathodic sputtering.
This type of Low-E must be used exclusively in insulating glass, with the coating on an internal face. It The Low-E coated glass allows most natural light to enter freely but absorbs a significant portion of short-wave heat energy. In the summer, long-wave heat energy radiating from objects is reflected back outside, lowering cooling cost. In winter, internal long-wave heat energy is reflected back inside, lowering heating cost.
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