This project consists of the construction of a new district heating network (0.29 km) and modernisation (7.78 km) of an existing district heating network in the Kędzierzyna-Koźla area. The construction and modernisation of the network will be implemented entirely in pre-insulated network technology to the following extent: a) modernisation of the district heating network No. 1 and 3 in Kędzierzyn – Koźl, (b) the construction of a new district heating network. Pre-insulated materials (tubes, fittings) used will be designed for the construction and modernisation of district heating networks for the transmission of a medium with temperature: supply pipeline – hot water 135 °C, return pipeline – hot water 65 °C, nominal pressure – 1.6 MPa.