A compartment has an air-conditioning assembly for supplying supply air into the compartment and drawing indoor air as extract air out of the compartment. The air-conditioning assembly is configured so that a portion of the extract air is discharged as exhaust air and another portion of the extract air is returned to the compartment as recirculation air, which is mixed with outdoor air drawn from the outside of the compartment and supplied as supply air. The air-conditioning assembly includes an air-conditioning unit and an air guiding means. The air-conditioning unit includes a housing having an ambient air inlet and a heat exchanger located inside the housing. The air guiding means is used for guiding the exhaust air from the compartment to a space inside the housing between the ambient air inlet and the heat exchanger for mixing the exhaust air with an ambient air from outside the compartment.

An electric or hybrid traction vehicle is provided with a passenger compartment conditioned using an air conditioning system, and with electrical/electronic components which are cooled by a waste heat dissipation and recovery system; such system transfers the recovered heat to an additional heat exchanger for heating and/or post-heating an air flow, which is conveyed towards the passenger compartment via an aeraulic duct; the additional exchanger is arranged in series with, and downstream of, an evaporator of a refrigerating assembly, which cools the air flow in the aeraulic duct.

An air conditioner includes a housing having a first outlet and a second outlet, a first channel communicating with the first outlet, a second channel communicating with the second outlet, a sensible heat exchanger to exchange sensible heat between a first air flowing through the first channel and a second air flowing through the second channel, a first vaporization filter to cool the first air by latent heat of water and a second vaporization filter to cool the second air by latent heat of water. The first vaporization filter is disposed downstream of the sensible heat exchanger in a flow direction of the first air. The second vaporization filter is disposed upstream of the sensible heat exchanger in a flow direction of the second air.