The project concerns the energy upgrade of the building of the 8th Primary School of Mytilene. The building of the 8th Primary School of Mytilene needs extensive work on both the building shell and the electromechanical installations, in order to further save energy, to upgrade it to energy category B+ and above. The interventions that will cover the project relate, in general, to the replacement of frames (frame-glass panels), with a new low coefficient of thermal permeability, the thermal insulation of the roof and the upgrading of the E/M installations (Heating-Lighting).