Motor support housing for a fan assembly for vehicle air treatment systems

Motor support housing (10) for a fan assembly for vehicle air treatment systems, comprising a seat (14) able to house an electric motor, the seat having a lateral wall (16) and a bottom wall (18) made of injection moulded rigid plastic material, in which the bottom wall (18) is provided with holes (20) for screws able to fasten the motor to the housing, and in which the housing (10) is provided with spacer elements (26) coaxial to said openings (20) and formed integrally with the bottom wall (18) from the same rigid plastic material constituting the housing (10).