Heating and/or air-conditioning device for the passenger compartment of a motor vehicle, with improved fresh air control

The air conditioning equipment (10) comprises an external chassis (11) forming a hot and/or cold air circulation duct to upper (12,13) and lower (14) ventilation ducts. Air propulsion means (15), air cooling means (16) and air heating means (17) are mounted in the chassis. There are two independent fresh air passages (20,22) between the heating means and the chassis interior wall either side the heating means so as to obtain, when necessary, additional fresh air to the ventilation ducts. An Independent claim is included for an automobile fitted with the air conditioning equipment.