In a first step it have been performed an analysis on consistency of existing school buildings and an assessment of buildings' envelope and thermal plant through data provided by the inventory and the energy labels. In this way it was possible to create a model on which analyze the current energy consumption and measure possible intervention actions. In reality it would not be possible to compare data form energy labels and data from energy measurement, being a comparison between a theoretical consumption calculated using standard assessment and a real consumption, influenced by operating conditions greatly different from calculation's asset rating. However, it have been useful to separate out the individual items of consumption and, therefore, to define priority actions to reduce energy consumption. On the basis of this analysis were then identified some actions of intervention, that have been assessed by simple PBT.