Motor-vehicle heating and/or air-conditioning device, with compact motor-driven fan unit

A motor-vehicle heating and/or air-conditioning device, comprising an air intake chamber having an inlet for outside air, an inlet for recirculated air and at least one flap which can selectively control said inlets, as well as a motor-driven fan unit which is arranged downstream of the air intake chamber, the fan unit comprising a casing accommodating a centrifugal turbine which is driven by a motor and being provided with blades and being able to take in an air flow axially, then deliver it tangentially to a heating and/or air-conditioning unit, wherein the combination formed by the outside-air inlet and the recirculated-air inlet extends on either side of an arbitrary plane passing through the axis of rotation of the motor of the motor-driven fan unit, said motor being located on the same side as the outside-air inlet and the recirculated-air inlet, and therefore on the same side as the intake of the air flow into the air intake chamber.