Abstract: The invention concerns an exhaust conduit (1) comprising an outer tube (3) and an inner tube (2) positioned inside the outer tube (3) so as to delimit, between those two tubes (2, 3), a peripheral volume (4) inside which is implanted a material (5) for thermal insulation of said conduit (1) and at one first end (6) of said conduit (1), first means (8) for connection to a first exhaust element and at a second end (7) of said conduit (1), second means (9) for connecting said pipe (1) to a second exhaust element comprised in said exhaust line. Said conduit (1) is characterized in that it comprises, proximate its second end (7), means (10) for preventing exhaust gases circulating inside the inner tube (2) from penetrating into the peripheral volume (4) delimited by said inner tube (2) and the outer tube (3).

Abstract: The invention concerns a heating, ventilating and/or air conditioning device comprising at least an air distribution channel having a downstream end, and at least an air diffusing element arranged at said one downstream end. The invention is characterized in that the air diffusing element (1) comprises a support (11) provided with through orifices (17) and covered over at least one of its faces with a material (12, 16), having air resistance ranged between 10 N.s.m−3 and 180 N.s.m−3.

Abstract: The invention concerns a heating, ventilating and/or air conditioning device comprising at least an air distribution channel having a downstream end, and at least an air diffusing element arranged at said one downstream end. The invention is characterised in that the air diffusing element (1) comprises a support (11) provided with through orifices (17) and covered over at least one of its faces with a material (12, 16), having air resistance ranging between 10 N.s.m −3 and 180 N.s.m−3 .

Abstract: A motor vehicle headlamp of the closed type includes ventilation means for ventilating its inside volume, said means comprising at least one air inlet and one air outlet. According to the invention, the air outlet opens out into a hollow column that is disposed so as to have a substantial inclination relative to the horizontal. The top end of the column is closed. Along one of the outside walls of the column there is an elongate opening which opens out to the outside and which has a top end terminating at a certain distance from the closed top end of the column. Finally, the air outlet opens out into the column at a certain distance above the top end of the opening. This provides an air outlet associated with a device that ensures that extraction takes place adequately even when the vehicle is stationary, while nevertheless minimizing the risk of water penetrating into the headlamp, e.g. due to a cleaning jet.