Core activities of the Upgrade DH project include the collection of the best practice project examples of recently retrofitted DH networks and best practice instruments/tools to diagnosing and retrofitting networks. Innovative business and organisational models will be applied, the upgrading process for selected district heating networks will be supported, the organisation of capacity building measures about district heating upgrading, financing and business models will be organised, and national and regional action plans will be elaborated. In addition, an image raising campaign for modern district heating networks will be carried out.