Cardiff and Vale College recently became the first building to receive heat from the network.
Over coming weeks, other buildings in Cardiff Bay, including Wales Millennium Centre, Butetown Hub, Nelson House, Tresillian House, Ty Hywel and the Senedd will also be connected.
Although the initial heat source is Viridor’s Energy Recovery Facility, the network is designed to be “heat source neutral”.
This means that, in future, it could potentially be connected to alternative or additional heat sources such as the groundwater or deep geothermal heat that exists beneath Cardiff’s streets.