The Company provides heat to more than 14,400 customers via its district heating network, with a length of more than 750 km, and is an expert in the efficient use of heat that is generated during electricity production in combined heat and power (CHP) plants. In addition, they use a variety of other environmentally friendly alternatives for heat generation. This includes heat from mine gas, waste heat from industrial processes, and heat generated in electric boilers and smaller decentralized CHP plants.

On December 20, 2022, the European commission decided on a stabilization package for Uniper under state aid law. As part of the approval the European commission set a number of structural remedies that Uniper must implement. One of the conditions is the sale of the district heating business in Germany.