The cement plant Gmunden has a waste heat potential of about 10 MW-th at 400°C. In the project, concepts and technologies are developed and analysed allowing the greatest possible CO₂ reduction. The waste heat from the industrial plant is to be conducted at a high temperature level via a 1.5 km long heat transport pipeline to large consumers in the urban area of Gmunden. For the high-temperature heat extraction from cement waste gas, both dirty gas and hot gas filtration are analysed in combination with a clean gas heat exchanger. The annual heat supply is a challenge since industrial companies have planned and unplanned production fluctuations which must be bridged in an economically and ecologically sustainable way by means of storage facilities.