A comfort system is provided for a motor vehicle. A seat occupancy sensor determines whether a third row zone is occupied. At least one flow controller is provided in the floor duct for controllably supplying the conditioned airflow to at least the third row outlet. If the third row zone is occupied, then a second row outlet and the third row outlet are turned on to supply a conditioned airflow to a front seat zone, a second row zone, and the third row zone. If the third row zone is not occupied, then the third row outlet is closed off. If the second row zone is not occupied, then the second and third row outlets are closed off. If occupied, then the second row outlet is turned on until a desired comfort level is achieved in the second row zone.