The European EPBD (Energy Performance in Buildings Directive) imposes mandatory inspection of HVAC systems with the aim of reducing building energy co nsumption and CO2 emission. Even if an inspection methodology was developed by HARMONAC IEE project, only few member st ates include mandatory inspection in national legislation. The methodology was tested on 400 buildings around Euro pe, showing some general problems on HVAC control. The main issue concerns HVAC system monitoring: without reliable energy consumption data, it is really difficult to achieve the EPBD main aim, the reduction of energy consumption. In this paper some examples are shown, demonstrating the im portance of energy monitoring and correct HVAC control set u
