直观地说，通过在夜间降低恒温器的温度可以节省汽油。大量的实验和分析研究证实了这一点。然而，与夜间挫折相关的通常是居住者的某种程度的不适。在早晨，当恒温器设置为白天温度时，空间温度不会立即响应，但由于结构的热容量和炉膛的有限热容量，空间温度会缓慢上升。这种延迟或恢复时间是不可取的，最好将其保持在最低限度。处理这种情况的一种方法是在早上起床前设置恒温器，以减少延迟的有效时间。另一种方法是通过安装大型熔炉直接缩短回收时间。这两种方法都有降低节能的缺点。第一种方法减少了节约，因为它减少了夜间倒退的时间；第二种方法减少了节约，因为随着炉子超大尺寸的增加，炉子的季节性运行效率降低。 本文讨论了夜间后退和炉子尺寸对节能和恢复时间的影响，并表明最佳炉子尺寸和后退水平取决于对节能和短期恢复的相对重视程度。引文:新墨西哥州阿尔伯克基市阿什雷学报第84卷第2部分

Intuitively, gas savings are possible by reducing the thermostat temperature during the night. Numerous experimental and analytical studies confirm this. However, associated with night setback is usually some degree of discomfort to the occupants of the residence. In the morning 'when the thermostat is set up to its daytime temperature, the space temperature does not respond immediately but rises slowly due to the heat capacity of the structure and the finite heating capacity of the furnace. This delay, or recovery time, is undesirable and best kept to a minimum.One way to deal with this situation is to reduce the effective hours of the delay by setting up the thermostat before arising in the morning. Another method is to directly reduce the recovery time by installing a large furnace.Both methods have the disadvantage of reducing energy savings. The first reduces savings because it reduces the hours of night setback and the second reduces savings because the seasonal operating efficiency of furnaces decreases as furnace oversize increases. This paper covers the effects of night setback and furnace sizing on both energy savings and recovery times and shows that an optimum furnace size and level of setback depends on the relative importance placed on energy savings and short recovery.