Relatively neutral in appearance, low-emissivity or low-E coatings reduce heat gain or loss by reflecting long-wave infrared energy (heat) and, therefore, decrease the U-value and improve energy efficiency. Current sputter-coated low-E coatings are multilayered, complex designs engineered to provide high visible light transmission, low visible light reflection and reduce heat transfer.
Guardian SunGuard® coated glass products deliver high light transmittance while reducing solar heat gain. Their neutral appearance is the most similar to clear uncoated glass. You can also use SunGuard SNX 62/27, SuperNeutral 68 and SuperNeutral 62 with a tinted outboard to achieve colored glass options with outstanding solar control.
SunGuard SNX 62/27, SN 68, SN 54, SNR 43, Neutral 50, Neutral 40 and IS 20 are low-E coatings.