There are two thermal connectors in Green City. When are these used?

Green City uses a predefined direction of movement of the media flow. Therefore, connectors of the type ‘VolumeFlowIn’ (coloured red circle as symbol) indicate that the media flow enters the model at this point and connectors of the type ‘VolumeFlowOut’ (red circle with white inner surface) indicate that the media flow exits the model at this point. An input and an output connector must therefore always be connected to each other to ensure a directed media flow in the model.