Energy Savings in Buildings: Environmental and Economic Impact of Insulating Glass

1, Thermal insulation

We know that the thermal conductivity of glass is 0.77W/ MK.

The thermal conductivity of air is 0.028 W/ MK, thus, the glass thermal conductivity rate is 27 times the air, air and water molecules in the active molecules, are the main factors that influence the insulated glass energy conduction transfer and convection transfer performance, thus improving the sealing performance of hollow glass, is an important factor to improve the hollow glass insulation performance.

Insulated glass made with clear glass ,U value is only half of monothlic glass,in addition to high performance low-E coating,U value can decrease only 0.6W/M2.K.The glass has high termal insulation perfromance and used in passive house.  below is clear glass and single low-e ,double low-e and triple low-e performance data.

2, Sound insulation

Insulated glass can reduce noise by 27-50 decibels, and 80 dB of traffic noise outside can be decreased to only 50 dBs to indoor.Combing with laminated glass,insulated glass sound insulation performance can be Maximized.

3, Dew free 

Dew resistance: below- 70C, could ensure IG units prevent dew everywhere in the world.

4, Safety performance / Energy saving

Because of the good thermal insulation performance of hollow glass, glass on both sides of the temperature difference, but also can reduce the cold radiation effects; when the outdoor temperature is -10 DEG C, the single glass window of the indoor temperature of -2 and hollow. The window glass temperature is 13 DEG C; in the same housing structure, when the outdoor temperature is -8 DEG C, the indoor temperature is 20 degrees centigrade, 3mm single cold radiation glass interior space of the region accounted for 67.4%, while the use of double hollow glass (3+6+3) was 13.4%.

The use of insulated glass, can improve the safety performance of glass, with the same thickness of the original glass case, 1.5 times the strength of the wind pressure is ordinary monolithic glass insulating glass.