Ventilation is derived from the Latin word “ventus,” which means “the movement of air” . It refers to the process of continuously providing fresh air to an indoor space by removing or diluting polluted air.

A staircase, also known as stairs, stairwell, or stair room, is a room in any type of building where a staircase is located. It is used for vertical connectivity between different levels or floors of the building. It provides vertical movement for users from one floor to another. A staircase consists of two flights, one for going up and the other for going down.