Under the new European legislation on the energy performance of buildings (EPB), the Member States of the Community are obliged to impose an inspection of air conditioning systems used in buildings in the tertiary sector whose power exceeds 12 kW. Reliable information and advice on the energy savings that can be achieved by properly adapting, repairing or modifying these systems must be available through targeted inspections. It has indeed become apparent that the potential for energy savings in this area is enormous.