The project concerns the energy upgrade of the 4th-5th Primary School of the Municipality of Grevena. The aim of the project is the energy classification of the building into category B+ of the Buildings’ Energy Efficiency Regulation (KENAK). The work includes: The installation of external thermal insulation and roof insulation. The installation of new LED light bulbs. The upgrading of the hot medium distribution system. The installation of heat pumps to increase the B.A. of the hot medium production system. The installation of monitoring systems for thermal and electrical energy consumed.