lifts offer two options of saving energy: both during travel operation, and also—and, in particular—in standby mode, depending on their frequency of use. In residential buildings, for example, the average standby period of a lift is roughly three times that of its travel operation, with standby operation accounting for around 70% of the annual energy demand; in office buildings, however, where lift use is far more frequent, standby phases account for only 40% of the lifts’ annual power consumption.