As part of the project, a comprehensive and deep thermal modernisation of the School Complex in Krynica Maritime is planned by: —warming of outer walls and stropodache; —exchange of window and door carpentry; — construction of a biomass-fired boiler room with a fuel storage facility (silos); —exchange of heat pipes between the boiler room and the residential building (ineligible cost); —installation of solar collectors, photovoltaic cells, wind turbine; —exchange of internal heating and technological heat installations; — replacement of mechanical ventilation system in the food block (kitchen/table) and sports hall with social facilities; — replacement of the internal lighting system; —modernisation of external lighting systems using photovoltaic cells and wind turbines. In the School Complex in Sztutow will be made: —internal construction of electrical installations; —assembly of electric switchgears and energy.light fixtures; —connection of cables in switchgears; —electric measurements