实验和理论计算均表明,普通窗户是住宅建筑中保温性能最差的部件。一九八三年冬季,我们对北京地区一栋一砖半外墙的砖混住宅建筑作了一系列的保温性能实测,其结果见图1、图2。由图1可知,在同样面积条件下,单位时间内通过单层玻璃窗损耗的热量是通过外 Both experimental and theoretical calculations show that ordinary windows are the worst insulation components in residential buildings. In the winter of 1983, we conducted a series of insulation performance measurements on a brick-and-half exterior brick-concrete residential building in the Beijing area. The results are shown in Figures 1 and 2. As can be seen from Figure 1, under the same area conditions, the heat loss through a single-layer glass window per unit time is through the outside.