The project consists of replacing heating equipment with elements of thermomodernisation in five residential buildings in Hungary. The project responds to problems identified in energy audits: low energy efficiency of all buildings, especially with regard to heating systems and the presence of carbon-intensive heat sources, insufficient warming of buildings, untapped potential for RES energy production – resulting in over-consumption of energy for the heating of dwellings and thus negative environmental impacts. The project involves the decommissioning of individual tiled stoves and the construction of boiler rooms equipped with gas boilers and the construction of a new central heating system. Additional thermal modernisation works will also be carried out in four buildings: in one building there is a warming of the front wall and a replacement of the doors in the building. The installation of photovoltaic panels is planned in four buildings. Design prepared in accordance with the principles of universal design. As a result of the investment, the energy demand for heating buildings will decrease, resulting in lower CO2 and PM10 emissions. The main objective of the project will be achieved: improve air quality and reduce “low emissions” by decommissioning coal furnaces in multi-family buildings in Hungary. The target group is the residents of the buildings covered by the investment and the local community of the city.