根据国家建设部统计资料,我国每年城乡新建房屋80%以上为高耗能建筑,既有建筑95%以上是高能耗建筑,建筑能耗占社会总能耗的27%。而建筑能耗中,通过玻璃门和窗户损失的能耗占到全部建筑能耗的40一50%。由此可见,门窗质量对节能降耗起着极为关键的作用。 According to statistics from the Ministry of Construction of the People’s Republic of China, more than 80% of newly-built houses in urban and rural areas in our country each year are high-energy-consuming buildings. Over 95% of existing buildings are high-energy-consuming buildings, and building energy consumption accounts for 27% of total social energy consumption. In building energy consumption, the loss of energy through glass doors and windows accounts for 40 to 50% of the total building energy consumption. This shows that the quality of doors and windows play a crucial role in energy saving.