The project shall include tasks consisting of: dismantling the network and building a new one, rebuilding 11 knots. As a result of the reconstruction of the district heating network, its length will be reduced by 0.13 km and will be built 0.4 km of the new network. This will improve the efficiency of heat distribution in Olsztyn – reduction of energy losses arising in the heat distribution process by 30 332.33 GJ/year and improvement of the environment by reducing CO2 emissions by 2.974 thousand tonnes/year.