Smoke Exhaust Fans

What it does

Flow Dynamics supplies smoke exhaust fans across the UAE for car park ventilation, stairwell pressurisation and atrium smoke clearance. Smoke exhaust fans keep escape routes usable by extracting smoke from stairwells, corridors, atria, and car parks during a fire. UAE Civil Defence and GCC codes require these fans to be certified for continuous operation at elevated temperatures, typically F300 (300 °C for 2 hours) or F400 (400 °C for 2 hours) to EN 12101-3. Flow Dynamics supplies both axial jet fans for car park smoke ventilation and large centrifugal extract fans for stairwell pressurisation and atrium clearance.

The working principle

On a fire alarm, the building management system starts the smoke fans and opens the relevant dampers. A car park jet-fan network pushes smoke in a coordinated direction toward a large extract shaft, the jet fans themselves do not extract, they induce airflow. Stairwell pressurisation fans inject fresh air into the stairwell at a rate that keeps the core at positive pressure relative to the floors, so when a stairwell door opens smoke cannot travel in. Certified high-temperature fans use heat-resistant bearings, insulation, and wiring so the motor survives direct exposure to flue gases for the rated duration.

Where it's used

Typical installations across the UAE and wider Gulf include:

• Stairwell pressurisation in high-rise towers
• Atrium and mall smoke clearance
• Car park impulse ventilation networks
• Tunnel and underpass emergency extract
• Data centre and generator hall smoke venting
• Metro and public transit smoke control

Technical data

Indicative ranges, exact specifications are confirmed per project on selection.

INFINAIR · KSA Flow Dynamics supplies equipment from this manufacturer. We do not act as authorised representative unless explicitly stated in a specific project supply agreement.