Air control device in particular for a heating ventilation and/or air conditioning installation for automotive vehicles

The present invention refers to an air control device, in particular for a heating, ventilation and/or air conditioning installation for automotive vehicles, comprising a housing having two apertures. It comprises two dampers with at least one portion of sealing. Dampers have a lower part comprising a U-shaped section (″) defining a groove operating conjointly with a portion having an inverted U shape of housing to create another portion of sealing. Housing has a lower part (″) comprising a groove operating conjointly with a rib disposed on the spiral whereon housing is mounted to define a further portion of sealing.