Pressurisation is a method of preventing smoke from entering a space that is designated as an escape path or for fire-fighting purposes such as staircase or lift lobby by means of introducing fresh air from the external to create a positive pressure within the space.
A stairwell pressurisation system is mechanically designed to establish air pressure variations between adjoining areas – such as an emergency escape route and a burning room. These air pressure differences (or variations) ensure that one side of a wall has positive and the other negative air pressure.
