根据 1 999年夏季对北京市居民住宅的室温测试数据 ,从所有测试房间的室温整体分布、室温平均值、室温波动幅度及室温延迟时间等方面描述现有住宅夏季的室内热状况特性 ,并通过研究分析得出总体上反映现有住宅夏季热状况的统计指标 According to the room temperature test data of residential buildings in Beijing in the summer of 1999, the indoor thermal condition characteristics of the existing residential houses are described in terms of the overall distribution of room temperature, the average room temperature, the fluctuation range of room temperature and the delay time at room temperature of all the tested houses. The research results show that the overall statistical indicators reflect the summer thermal conditions of existing residential buildings