The project "Boiler subsidies IV." supports the replacement of non-compliant solid fuel combustion sources with ecological sources meeting the emission requirements of the 3rd or higher emission class. The project is focused on the replacement of boilers for low-income households. The primary objective of the project is to reduce the pollution burden on inhabitants in the territory of the Capital City of Prague and at the same time to improve air quality within the area. The project builds on the successful implementation of "Boiler Grants I., II. and III."