A city’s journey to a fossil free heating and cooling system - and what the future holds. We share Lund’s 60-year collaborative journey to a city-wide fossil free heating and cooling system, with innovative solutions like the largest low temperature heating network in the world, systems for sharing energy between buildings, a digital platform for trading and managing energy and more. We discuss challenges for heating and cooling systems in cities and industry internationally, and look for future collaboration opportunities. We discuss the geothermal developments in The Hague, and we give a preview of the System Transition Demonstrator taking shape in Lund’s Innovation District.