The project concerns the energy upgrade of the 2nd and 2nd High School of the Municipality of Grevena. Upon completion of the project the building is energy upgraded to 91,3 % and is energetically classified in the category A+ of the Buildings’ Energy Efficiency Regulation (KENAK).The work includes: The installation of new light bulbs of new LED technology. The installation of thermal insulation systems.The upgrading of the hot medium distribution system.The installation of heat pumps for the increase of the B.A. of the thermal medium production system.