Subterranean Safety Engineering: Certified Smoke Control in Tunnels and Car Parks

The infrastructure of modern cities is increasingly moving underground. Shopping malls, residences, hospitals, and highway tunnels spanning kilometers... In these giant closed volumes, the most critical duty of mechanical systems is not comfort, but Life Safety and Sustainability.

As Axvorn Engineering, we design the Jet Fan technologies we offer in closed car park and tunnel ventilation not just as air transfer equipment, but as smart safety shields that save lives during fires and provide energy savings during daily use.

Here are the fundamental building blocks of Jet Fan engineering required by modern projects:

1. The Pinnacle of Standards: EN 12101-3 and High Temperature Resistance

The quality of a ventilation system is proven not during normal times, but in moments of crisis. In a potential fire scenario in car parks and tunnels, the fans must continue to operate without melting and create an escape corridor by exhausting the smoke.

All fan groups in our systems are:

• Certified Safety: Tested by internationally accredited bodies, they comply fully with the EN 12101-3 standard.

• Extreme Durability: Depending on the project requirements, they are manufactured to operate continuously at 300°C for 2 hours (F300) or 400°C for 2 hours (F400).

• Material Quality: Due to their high-quality, corrosion-resistant galvanized steel and special alloy body structures, they offer a long service life in environments damp with moisture and heavy exhaust loads.

2. Architecture-Specific Solution: Axial and Radial Technologies

The geometry and aerodynamic needs of every structure are different. Axvorn offers technologies that are "specially chosen" for that architecture, rather than being "fitted" into the architectural constraints of the project.

Axial Jet Fans: High Thrust Power

Preferred in wide-span car parks and tunnel-like long corridors, this technology drives smoke towards shafts by pushing the air like a piston.

• Flexible Performance: Because of the adjustable blade angles, optimization can be carried out on the fan even if the project's airflow rate requirements change.

• Easy Maintenance (Sliding System): Thanks to the unique sliding body design, it is not necessary to dismantle the fan completely from the ceiling to access the motor and impeller. This feature minimizes maintenance costs and time in the operational phase.

Radial Jet Fans: Low Ceiling Friendly

Ideal for malls and residential projects where ceiling height is limited, preventing air obstacles created by beams.

• Compact Design: With its flat geometry and a motor integrated internally into the rotor, it prevents loss of space from the ceiling level. It preserves vehicle clearance height.

• Strong Induction: By projecting air at high speed, it stirs exhaust gases accumulated in dead zones.

3. Tunnel-Type Heavy Duty Systems

Highway and subway tunnels are the most challenging testing grounds of engineering. The heavy-duty fans we have developed for these areas are capable of reversible operation.

• Bidirectional Protection: The blade structure can reverse the air flow with 100% performance. This way, the automation system decides which direction the smoke will be discharged, depending on the location of the fire or the traffic flow.

• Acoustic Comfort: Sound pressure created by high air velocities is brought under control by integrated silencers.

4. Smart Automation and Energy Efficiency

Power without control is waste. Axvorn Jet Fan systems operate by communicating with integrated automation panels and sensor networks.

• Daily Mode (Eco-Mode): Continuously monitors Carbon Monoxide (CO) levels in the environment. If there is no pollution, the fans stop or rotate at minimum speed, providing significant energy savings.

• Emergency Mode: As soon as a fire is detected, the system switches to "Full Power" mode and evacuates smoke as quickly as possible.

Conclusion: Integrated Safety

Ventilation in a car park or tunnel project means more than the sum of its parts. Correctly selected fan types, correct layout engineering, and certified durability determine the value and safety of the building.

As Axvorn Engineering, we design and offer ventilation solutions that are best suited to your project's architectural structure, complying with international standards, and operationally friendly.

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