This Horizon 2020 project promotes the implementation of "small modular renewable heating and cooling grids" for communities in South-Eastern Europe. CoolHeating transfers knowledge from partners in countries where renewable district heating and cooling examples exist (Austria, Denmark, Germany) to countries where there are less examples in the sector (Croatia, Slovenia, Macedonia, Serbia, Bosnia-Herzegovina). Core activities, besides techno-economical assessments, include measures to stimulate the interest of communities and citizens to set-up renewable district heating systems as well as the capacity building about financing and business models. Keywords: district heating, district cooling, renewable energy, solar energy, business models, financing, technical barriers, demonstraters