Energy consumption, particularly electric consumption, in buildings is greatly influenced by the behavior of its occupants. The analysis of the electrical uses thanks to a feedback performed on a test-building platform makes it possible to identify different forms of user satisfaction calling into question the notion of energy efficiency in buildings. In order to take into account the human actors in the design of building systems, it is proposed to define the notion of energy use efficiency (EUE). This notion is based on the user satisfaction about services that has been split and quantified as rational and sensitive satisfaction functions. This notion led to the construction of a cost / satisfaction compromise diagram, which is an effective tool for decision support during the design of building energy systems taking into account the occupants but also a support tool for energy sobriety during operation.
