The project concerns the energy upgrade of the 6th and Vespers High School and the 4th General Lyceum and Vespers High School of Chania, school units that constitute the school complex of the Municipality of Chania. It includes specialised interventions such as:- Installation of a certified external thermal insulation system.- Remove the existing metal panels from the roofs of the buildings and complete construction of thermal insulation – liquid insulation in them.- Removing the simple metal frames of single glazing and replacing them with double-glazed aluminum frames, with thermal interruption.- Heating of the interior spaces of the building through central air cooling, the new heating modules.