For a vehicle, a unitary vehicle air conditioning and heater assembly with the operative parts of the air conditioning system within a housing enclosure which has various openings therethrough for selective air flow into and out of the enclosure. The vehicle has interior body panel means between the engine compartment and the passenger compartment which form a deep recess which opens into the engine compartment for insertion/ removal of the assembly. The enclosure has various openings therethrough for air flow and the configuration of the recess and housing enclosure are so that the housing enclosure can be readily fitted into and removed from the recess including alignment of the various openings.