What is the purpose of staircase pressurization fan?
Pressurisation fans provide an elevated pressure with the protected regions, preventing smoke leakage into the lobby / stair well by overcoming the pressure developed by a burning fire.
What is lift pressurization fan?
Lift Pressurisation Fans are need of the hour, they are used to pressurise the lift shaft. These Fans play a vital role in safety during a fire. These are Manufactured from heavy duty mild steel material and best in class Impellers to provide optimum pressurised air to maintain positive pressure in lift shaft.
What is stairwell pressurization testing?
Stairwell pressurization systems are designed to provide a smoke proof enclosure and a means of egress during a smoke control event. Stairwell pressurization testing is conducted to verify that shaft pressurization meets minimum requirements when the system is in operation.
Do stairwells require ventilation?
Vestibules and egress stairs are generally not considered “occupiable” spaces under ASHRAE 62, and therefore would not require ventilation. However, if you want people to actually use the stair, adding ventilation would make it a more attractive option.
What is the minimum differential pressure for stair pressurization?
The air supply shall be sufficient to maintain a minimum airflow of 2 m/s. The pressure difference across a closed door between the pressurized stair and the lobby/corridor shall not be less than 50 ± 10 Pa.
What is staircase pressurization system?
A pressurization system is intended to prevent smoke leaking passed closed doors into stairs by injecting clean air into the stair enclosure such that the pressure in the stair is greater than the adjacent fire compartment.
What is staircase pressurisation system?
What is stair pressurization system?
In its simplest form, a stair pressurization system uses a supply fan to blow outside air into a stairwell, creating a positive pressure differential across the enclosure boundary. However, the design of these systems can depend greatly on the codes and standards used in design.