The invention relates to an air-conditioning unit comprising a cooling circuit with components such as a compressor (1) for compressing a refrigerant, a condenser (3) and an evaporator (9). At least one part of the components of the cooling circuit is held in the operational position thereof by a common housing in the form of housing shells (20, 24). The housing shells (20, 24) are made from a foamed plastic material, for example, expanded polypropylene (EPP). An additional metal sheet or plastic housing is not necessary.