The project concerns the energy upgrade of the Argos Orestiko Elementary School. The tasks to be carried out are: External thermal insulation shell. — Dismantling and fitting new frames. Roof thermal insulation. Replacement of an air-conditioning heating system with heat pumps. — BMS-type energy management and automation system. — Power table for the power supply and operation of heat pumps. — Installation of a photovoltaic power generation system for the interconnection with the provider (net metering). Replacement of indoor fluorescent lamps with a new type of led technology.