District Heating System Bratislava-Stare Mesto (SK) Complete rehabilitation of 56 coke and brown coal district heating plants in the historic city center of Bratislava. Complete rehabilitation of 56 coke and brown coal district heating plants to supply about 2.000 apartments with room heating and hot service water in the historic city center of Bratislava. The project has been implemented in 4-year stages starting in 1997. TPA consulting services: preparation of rehabilitation concept, evaluation of expected potentials for energy saving, evaluation of expected environmental benefits, financial engineering services regarding project financing and subsidizing, monitoring of project realization, project documentation. Results: Increase in energy efficiency: 20%, reduction of CO2-emissions approx. 4530 tons/year. ACM is a consortium of This project was done by TPA Energie- und Umwelttechnik GmbH.