The main application of Vacuum Glass is for building energy saving and reducing building energy consumption. At present, world's building energy consumption is quite high among the total social energy consumption. If we do not save energy, we will waste a lot of energy for building heating and cooling. Energy Saving Vacuum Glass for windows are the key to building energy conservation. According to the calculation of the U.S. Department of energy, the value of energy wasted in the United States due to the poor thermal insulation performance of windows is 20 billion every year. Environmental Vacuum Glass is recognized as the best energy-saving Building Glass product in the world. Therefore, Vacuum Glass For Passive House will become the development trend of energy efficiency windows. vacuum glass has the obvious advantages: Sound insulation performance Heat resistance Thermal insulation Sun proof function Anti-condensation function Low-e anti-radiation function Long lifespan up to 50years Wind resistance Photochromic glass Fireproof and bulletproof performance Unique vacuum eye technology Unique low temperature welding technology