Pressurization System for Stairwells, Lift wells and Lift Lobbies

Pressurization System for Stairwells, Lift wells and Lift Lobbies

In a high-rise building, the stairs typically represent the sole means of egress during a fire. It is imperative for the exit stairs to be free of smoke and to incorporate design features that improve the speed of occupant egress. Most building codes require the fire stairwells in a high-rise building to be pressurized to keep smoke out. The stairwell pressurization serves several purposes:

 • Inhibit migration of smoke to stairwells, areas of refuge, elevator shafts, or similar areas.

• Maintain a tenable environment in areas of refuge and means of egress during the time required for evacuation.

• Facilitate the fire and rescue operation by improving visibility in the building for the firefighting crew.

 • Protect life and reduce damage to property.