Energy services play a growing role in the control of energy consumption and the
improvement of energy efficiency in non-residential buildings. This work consists in the
application of a simulation-based approach dedicated to whole-building energy use analysis
for use in the frame of an energy efficiency service process. Focus is given to the calibration
of a simplified dynamic hourly building energy simulation model by means of available
energy use data and to the integration of the calibration process into the Energy Service
Process. The developed simulation tool and the associated calibration method are applied to a
real case study building located in Brussels, Belgium. The use of an evidence-based method
ensures sticking to reality and avoids bad representation and hazardous adjustment of the
parameters. Moreover, it is shown that the use of a sensitivity analysis method is of a great
help to orient data collection and parameters adjustment processes
