A vehicle air conditioning, heating and air circulation system is provided for a vehicle utility space. A condensor and evaporator of a vehicle compressed-air air-conditioning system are arranged respectively in the inflow and outflow air channels for the vehicle space. A heat exchanger cycle of a vehicle water or oil engine cooling heat exchanger system is disposed in the inflow air channel. A pivotal flap is disposed intermediate the inflow and outflow channels to selectively control the flow of air.