辽宁省建设部门规定今后住宅建筑中将限制使用铝合金门窗,推广使用塑料门窗。 铝合金门窗具有美观大方的优点,很受人们喜爱,近年不仅在商业性建筑中采用,而且在居民住宅楼中也被大量采用。而目前我国铝材短缺,大都依赖进口,每年我国要从国外进口数十万吨铝材,需大笔外汇,而这些进口铝主要用于飞机、汽车、电器等制造领域。从耗能角度来看,铝合金门窗耗能明显高于塑料门窗。耗能可 The construction department of Liaoning Province stipulates that the use of aluminum alloy doors and windows will be restricted in residential buildings in the future, and the use of plastic doors and windows will be promoted. Aluminum alloy doors and windows have the advantages of nice appearance and are popular with people. In recent years, they have not only been used in commercial buildings, but also used in residential buildings. At present, China’s shortage of aluminum materials depends mostly on imports. Each year, China imports hundreds of thousands of tons of aluminum from foreign countries and requires large amounts of foreign exchange. These imported aluminum are mainly used in aircraft, automobiles, and electrical appliances. From the perspective of energy consumption, aluminum alloy doors and windows consume significantly more energy than plastic doors and windows. Energy consumption