北方采暖地区许多城市的既有建筑,尤其是2000年前建成的建筑,建筑能耗和居住环境都较差。由于建筑围护结构的保温隔热性能差,冬天的室内温度低,墙体结露;夏天室内温度很高,即使安装家用空调,仍然得不到改善;再加上一些不健康的建材等原因,生活在这些建筑里的居民长期处于较差的室内环境中。 Existing buildings in many cities in the northern heating area, especially those built 2000 years ago, have poor building energy consumption and living conditions. Due to the poor thermal insulation performance of the building envelope, low indoor temperatures in winter and dew condensation in the walls, high indoor summer temperatures, even with home air conditioners, are still not improved. Coupled with some unhealthy building materials and other reasons, The inhabitants living in these buildings have long been in a poor indoor environment.