Blower unit and method for ventilating a vehicle

The fan arrangement has a dual fan (4) driven by an electric motor (10) connected on the inside to an induction channel (12) and on the outside to at least two outflow channels (6), whereby at least one of the outflow channels has a return element (14) via which the relevant outflow channel can be connected to the induction channel depending on the situation. AN Independent claim is also included for the following: (a) a method of ventilating a vehicle.