Control unit for the thermal environment in a passenger compartment of a motor vehicle

The control has a peripheral part (10) with control knobs (11), and a central part (20) forming a ventilation nozzle (21) which comprises of an air flow attitude control (22). The peripheral part also includes an information medium (12). The nozzle has an edge (23) which forms a continuity with edges (13) of the knobs. The peripheral and central parts form a module carried by a ventilation conduit.