TEN21 is an international collaboration platform supporting decision makers in district heating and cooling companies and investors in district energy to identify what to build (system design) or how to refurbish existing assets. In addition to technical design, the network, which includes also some experts from Eurac Research, performs project bankability and investment analyses. The team encompasses expertise across the value chain: from energy system modeling, system outline, business modeling to investment planning. The TEN21 team ensures that investments made today, lead to long term (2060-70-80) goals being met.