A device for thermal conditioning includes a cooling fluid circuit, a heat transfer fluid circuit, and a fluid/fluid heat exchanger that is intended to enable thermal exchange between the cooling fluid and the heat transfer fluid. The cooling fluid circuit includes at least one compressor, a first outer heat exchanger through which an outer air flow passes and a first evaporator. The heat transfer fluid circuit includes at least a first inner heat exchanger, a first heat source and a second outer heat exchanger through which the outer air flow passes. The cooling fluid circuit includes a second evaporator.