a cooling fan system for a vehicle with fuel cell propulsion , wherein air is moved by means of a cooling fan for cooling purposes through a heat exchanger and can thereafter be supplied to the environmental air either directly or indirectly after satisfying one or more further cooling tasks , characterized in that an air branching device is provided which supplies at least a part of the air delivered by each fan to a duct and thereby enables the use of the branched - off air for the starting of the fuel cells and / or for the maintenance of the operation of the fuel cells .