The content of the project is the implementation of the Programme for the exchange of heat sources in low-income households of the Zlín Region II. The aim of the project is to improve air quality in the residential development of towns and municipalities of the Zlín Region by long-term reduction of emission concentrations of the most problematic pollutants (benzo(a)pyrene and suspended particulate matter PM10, PM2.5), which will be achieved by limiting emissions of pollutants from local heating of households through the exchange of non-compliant, obsolete solid fuel heat sources.