Low-E insulating glass has superior thermal insulation performance to clear insulating glass: In winter, when outdoor temperatures are lower, its inner surface temperature is higher; in summer, when outdoor temperatures are higher, its inner surface temperature is lower.

Detailed calculations have been done using WINDOW software for reference.

Glass Structure

Surface Temperature Outside

Surface Temperature Inside
Clear IGWinter-14.7℃

Summer32.2℃

Winter7.6℃

Summer31.1℃

Low-E IGWinter-17.1℃

Summer37.1℃

Winter13.4℃

Summer27.9℃

Surface temperature of clear insulating glass unit (argon content 90%, cavity 12mm), as shown in the figurethe Difference in Glass Temperature Between Clear IG and Low-E IG_News01.webp

Surface temperature of low emissivity insulating glass unit(argon content 90%, cavity 12mm), as shown in the figurethe Difference in Glass Temperature Between Clear IG and Low-E IG_News02.webp