Abstract: An air-conditioning system for vehicles, that can be retrofit installed into a roof ventilation opening, a roof ventilation assembly, with an extremely low overall height above the roof of the vehicle, as a substitute for a hatch of the ventilation assembly provided for the closing and opening of the roof ventilation opening. The system has a receiving part that can be attached instead of the hatch without modification to the roof opening or hinge assembly for the hatch. The receiving part has a circulating-air intake device that is separated from the delivery side of a blower that is disposed in a recessed central area of the receiving part that can be inserted through the roof opening to below the level of the roof. The air-conditioning system, as a whole, by means of the hinge assembly of the ventilation system, can be moved in such a way that, also, a direct ventilation via the roof opening is possible.

Abstract: An air conditioning system for roof mounting on motor vehicles having a compact design, and a favorable ratio of performance density, whereby such air conditioning system is cost-effective for retrofit and maintenance purposes. The air conditioning system has a large surface condenser block of the condenser part, arranged between the evaporator blocks of the evaporator part, resulting in a nest effect design of the condenser part and evaporator part. In order to ensure low resistance discharge of the condenser part's exhaust, and to further ensure uniform admission of circulating air to the entire height and length of the evaporator block, a specifically designed trough-shaped housing part is provided, which serves to transversely separate the evaporator part and the condenser part. Such a design of the air conditioning system reduces the dimensions of the assembly's height extending above the vehicle roof to a minimum.