Installation for the thermal conditioning of a passenger compartment and/or at least one component of a motor vehicle, comprising: - a first circuit for circulating a heat transfer fluid, - a second circuit for circulating a refrigerant fluid, capable of forming a heat pump type circuit, the heat transfer fluid circuit including heating and/or cooling means (M1, M2, M3) intended to heat and/or cool at least one component of a motor vehicle, such as for example a battery, an electric motor or an internal combustion engine, means (S1, S2) for storing calories and/or frigories comprising a phase-change material, a first heat exchanger forming an evaporator and capable of exchanging heat with the refrigerant circuit, and means for circulating the heat transfer fluid, capable of drawing frigories and/or calories from the storage means (S1, S2) or the first exchanger, so as to transfer them to the heating and/or cooling means (M1, M2, M3), the heat transfer fluid circuit comprising a second heat exchanger capable of heating or cooling air intended to enter the passenger compartment of the vehicle, the means of circulation of the heat transfer fluid being capable of drawing frigories and/or calories from the storage means (S1, S2) or the first exchanger, so as to transfer them to the second exchanger, the refrigerant fluid circuit comprising a sixth heat exchanger capable of forming an evaporator and capable of exchanging heat with air intended to enter the passenger compartment of the vehicle. characterized in that the refrigerant fluid circuit comprises a fourth heat exchanger capable of forming a condenser and capable of exchanging heat with air intended to enter the passenger compartment of the vehicle. - a first circuit for circulating a heat transfer fluid, - a second circuit for circulating a refrigerant fluid, capable of forming a heat pump type circuit, the heat transfer fluid circuit including heating and/or cooling means (M1, M2, M3) intended to heat and/or cool at least one component of a motor vehicle, such as for example a battery, an electric motor or an internal combustion engine, means (S1, S2) for storing calories and/or frigories comprising a phase-change material, a first heat exchanger forming an evaporator and capable of exchanging heat with the refrigerant circuit, and means for circulating the heat transfer fluid, capable of drawing frigories and/or calories from the storage means (S1, S2) or the first exchanger, so as to transfer them to the heating and/or cooling means (M1, M2, M3), the heat transfer fluid circuit comprising a second heat exchanger capable of heating or cooling air intended to enter the passenger compartment of the vehicle, the means of circulation of the heat transfer fluid being capable of drawing frigories and/or calories from the storage means (S1, S2) or the first exchanger, so as to transfer them to the second exchanger, the refrigerant fluid circuit comprising a sixth heat exchanger capable of forming an evaporator and capable of exchanging heat with air intended to enter the passenger compartment of the vehicle. characterized in that the refrigerant fluid circuit comprises a fourth heat exchanger capable of forming a condenser and capable of exchanging heat with air intended to enter the passenger compartment of the vehicle. the heat transfer fluid circuit including heating and/or cooling means (M1, M2, M3) intended to heat and/or cool at least one component of a motor vehicle, such as for example a battery, an electric motor or an internal combustion engine, means (S1, S2) for storing calories and/or frigories comprising a phase-change material, a first heat exchanger forming an evaporator and capable of exchanging heat with the refrigerant circuit, and means for circulating the heat transfer fluid, capable of drawing frigories and/or calories from the storage means (S1, S2) or the first exchanger, so as to transfer them to the heating and/or cooling means (M1, M2, M3), the heat transfer fluid circuit comprising a second heat exchanger capable of heating or cooling air intended to enter the passenger compartment of the vehicle, the means of circulation of the heat transfer fluid being capable of drawing frigories and/or calories from the storage means (S1, S2) or the first exchanger, so as to transfer them to the second exchanger, the refrigerant fluid circuit comprising a sixth heat exchanger capable of forming an evaporator and capable of exchanging heat with air intended to enter the passenger compartment of the vehicle. characterized in that the refrigerant fluid circuit comprises a fourth heat exchanger capable of forming a condenser and capable of exchanging heat with air intended to enter the passenger compartment of the vehicle.