Following promising results of the recent geothermal exploration in the region next of the airport “Makedonia” of Thessaloniki, the Civil Aviation Authority of Greece, which is responsible for managing the airport, will drill a deep (up to 800 m) geothermal borehole within the premises of the airport, in order to investigate and exploit local geothermal potential for heating and cooling the new terminal building. The energy needs of the building have been estimated as 8 MWt and 16,800 MWh for heating. The cooling needs of the building may be even higher