energy saving: very low U value(=1.0w/m2k)could be less if filled with inert glass,thus,reduce the heat transfer coefficient
noise refuction: could reduce 30 decibelsand diminish 5 decibel more if filled with iner gas
anti-dew under even the temperature below-70degree
under the cnditions of same insulation effect, insulating glass can increase the lighting area,enhance interior comfort and simlify the building structure