Definitions for "Low-E"
Low-emissivity. Emissivity is the relative power of a surface to emit heat by radiation. A "low-e" metallic coating on window's glass pane slows the rate at which the glass will absorb heat, thus providing better insulation.
A "SHORT HAND" TERM FOR LOW EMISSIVITY COATED GLASS. IT IS A METALLIC OXIDE COATING APPLIED DIRECTLY TO THE GLASS IN EITHER A SOFT-COAT OR HARD COAT VERSION. THE COATING IS NEARLY INVISIBLE AND EASY TO SEE THROUGH. IT REFLECTS AWAY THE LONG-WAVELENGTH INFRARED RADIATION WHICH CUTS DOWN THE HEAT TRANSFER BETWEEN THE SHEETS OF GLASS.
(Low-Emissivity) insulating glass Low-E insulating glass provides the best year-round performance and lowers energy costs by at least 15 percent (based on savings over clear glass). Low-E glass features transparent microscopic layers of silver placed between layers of anti-reflective metal oxide coatings. These coatings block 83 percent of harmful UV rays and 96 percent of the sunâ€(tm)s infrared heat, so homes stay cooler in the summer and interior furnishings fade less. In the winter, Low-E helps keep homes warmer for improved comfort and reduces condensation. It also delivers greater visible light transmittance than tinted glass.