Open window in the ceiling or at the top of the walls.
The ventilators, like the skylights, are intended to transmit natural light inside the building
Set of steps or steps that link two planes at different levels in a construction or land, and that serve to raise and lower.
Opening in a wall or wall where an element is placed and which generally serves to look and give light and ventilation.
Hollow piece, usually cylindrical and generally open at both ends.