How Do Jet Fans and Smoke Exhaust Fans Work Together in a Fire Scenario?
Jet fans and smoke exhaust fans do different jobs in a car park smoke-control system. Jet fans direct the flow, while main exhaust fans remove smoke from the system. Effective operation depends on both groups working as parts of the same scenario.
What happens when a fire is detected?
The fire detection and control system operates fans and dampers according to the project sequence. Rather than running every fan at once, the design may use specific zones and airflow directions.
What is the role of a jet fan?
A jet fan does not normally discharge smoke directly outside the building. It supports the intended airflow path and helps move smoke toward exhaust points.
What is the role of a smoke exhaust fan?
The main exhaust fan removes smoke through a shaft or duct system. Its airflow and pressure capability must be suitable for the system resistance and project calculation.
How do make-up air and dampers participate?
Replacement air and damper positions help maintain the intended airflow direction while smoke is extracted. They are controlled as part of the same sequence.
Why must the complete system be verified together?
Correct individual fan selection is not enough. Layout, direction, airflow, thrust, pressure, damper positions and controls must work together to create the intended smoke movement.