Vehicle seat and seat element equipped with a ventilation system comprising a duct

Seat element comprising a supporting structure, padding configured to serve as a support for a user when located between the supporting structure and the user, and a ventilation system comprising at least one fan and a duct defining an air passageway placing the fan and the padding in communication, wherein the duct comprises a first member and a second member fixed to one another, the first member being arranged between the supporting structure and the padding, the second member being arranged between the first member and the padding and having a symmetrical shape comprising distinct left and right arms which join together at one end and extend separately along the first member on opposite sides of a plane of symmetry of the second member such that a central area of the padding between the left and right arms is in direct contact with the first member.