It is not only high energy costs, but also environmental regulations and corporate sustainability goals that are prompting companies and public institutions to look for sustainable solutions for resource-saving energy consumption. Data centres, especially in densely populated regions such as Frankfurt, are the focus of attention. This is because while data centres provide critical digital services, they also produce considerable amounts of waste heat that could potentially be used as an energy supplier. Carsten Schneider, General Manager Germany at CyrusOne, shows how waste heat utilisation can promote the energy transition and how integrating data centres into the urban and industrial energy supply is not only possible, but also makes economic sense.