This project involves the replacement of non-organic heat sources in public buildings and residential buildings in the municipality of Opoczno. The exchange of heat sources will be preceded by the preparation of appropriate design documentation. New heat generators will comply with the Ecodesign Directorate (2009/125/EC) The overall scope of the project is as follows: 1) Elaboration of design documentation 2) Installation of single-function LPG boilers in the buildings of the day-care centres in Bielowice, Karwice, Kraśnica, Modrzewiu, Mroczków Gościnny, Ostrów and Stużnie – replacement of non-organic heat sources for modern liquid gas boilers together with the adaptation of internal installations to work with new heat sources and construction of gas tanks and gas installations 3) Installation of modern heating devices in residential buildings – Exchange of 62 non-organic heat sources in residential buildings for modern heating devices (3 gasification boilers, 12 automatic biomass boilers, 25 single-function gas boilers (natural gas), 7 dual-function gas boilers (natural gas), 7 single-function LPG boilers, 3 LPG dual-function boilers, 5 air heat pumps) together with the adaptation of internal installations to work with new heat sources and gas tanks and gas installations. Stages of project implementation: I. Elaboration of project documentation – 11.2020-31/03/2021 II. Replacement of heat sources in day-room buildings – 04.2021-31.07.2021 III. Replacement of heat sources in residential buildings – 08.2021-30.11.2023. The final recipients of the project will be users of public buildings and owners of residential buildings. Thanks to the implementation of the project, it will be possible to reduce the primary energy demand of buildings by 1387.09 GJ/year (385303.07 kWh/year) – approx. 23 % and reduction of greenhouse gas emissions by 254,64 MgCO2e/year (approx.