cooling system, air conditioning or heating separate units and box containing one of the units

A system (20) based on the principle of the heat pump using the outdoor air as an external source and is of the heat exchange units in which separate on the one hand, the condenser and, Moreover, the compressor, evaporator and expansion member are divided into two distinct and remote units from one another. The system comprises: - a unit (22) providing heat exchange with the outside air and comprising a heat exchanger (32) in which circulates a heat transfer fluid, the unit comprising an outer suction air inlet, an outlet (40) to exhaust air, - a box (24) accommodating the unit and open on one side (24e) facing the outlet (40), - separating means between the exhaust air and outside air entering the box from the open side and adapted to the air inlet of the unit.