It is possible to observe the users of a heating system’s level of comfort through online surveys. Using fuzzy logic the behaviour patterns that generally occur in an office can be detected. It is also possible to detect situations when it can be decided to maximise comfort and/or maximise savings. This article puts forward a methodology for saving energy in these systems depending on the occupation and feeling of comfort of its occupants. The methodology used provides important and useful information to be able to select the comfort set-point of the rooms of a central heating system without the need to use fixed values based on programmed time schedules or any other methodology.