Heat networks are a convenient way to distribute renewable heat from centralized production units to local heat clients. When environmentally and economically relevant, they can contribute to a significant decarbonization of the heat consumption, that plays a major role in the emission of GreenHouse Gases. When combined to power production, they can also be used as a means to offer flexibility to the electrical networks. At BRITE, we work on the assessment of the potential contribution of heat networks, as well as on the development of optimal design and operation methods.