Main objective:Improving air quality in the Besko commune by reducing pollution to the atmosphere and increasing the energy efficiency of the building’s School Complex in Besk.Detailed objectives:-ecological effect – reduction of CO2 into the atmosphere,-increasing energy efficiency of the building,-use of renewable energy sources,-reduction of energy costs,-increasing thermal comfort of the building.The project includes construction works related to the modernisation of the School Complex in Besk. The work will include: replacement of window joinery, modernisation of central heating system, reconstruction of gas boiler room, as well as installation of a set of photovoltaic cells (160 PV cells) with a total capacity of 40,00[KW]. The production of energy will be used for the own needs of the building.The investment will reduce the computational energy demand by 37.07 %, as well as to achieve the EP ratio = 182.43 kWh/m2year