According to an aspect, there is provided a method for managing power demand of a plurality of passenger transport installations in at least one building. The method comprises obtaining first data on available time-dependent power consumption flexibility capacity from each passenger transport installation; obtaining second data from at least one external data source, the second data being independent from operation of the passenger transport installations; determining an activation order for power demand management of the plurality of passenger transport installations based on the obtained first data and second data; and transmitting a passenger transport installation specific activation signal for the power demand management to at least one passenger transport installation of the plurality of passenger transport installations in accordance with the activation order.