Frequently Asked Questions – Tunnel Ventilation Units

At Venkonair, we specialise in providing high-performance tunnel ventilation systems designed for optimal airflow, safety, and efficiency. Below are some of the most common questions about our tunnel ventilation units.

1. Why is ventilation important in tunnels?

Tunnel ventilation is essential for maintaining air quality, removing pollutants, and ensuring safety in case of fires. Our systems are designed to control smoke, carbon monoxide, and other emissions, creating a safe environment for road, rail, and underground infrastructure.

2. What types of ventilation systems do you offer for tunnels?

• Longitudinal Ventilation – Jet fans placed along the tunnel to push air in a controlled direction.
• Transverse Ventilation – Ducted systems that supply and extract air through designated channels.
• Semi-Transverse Ventilation – A hybrid system combining elements of both.

3. What are jet fans, and how do they work?

Jet fans are a key component of longitudinal ventilation systems. They are mounted on the tunnel ceiling or walls and use powerful thrust to move air in a controlled direction, removing pollutants and smoke while maintaining visibility.

4. How do your ventilation units handle emergency situations, such as tunnel fires?

• Smoke extraction capabilities to clear escape routes.
• Fire-resistant materials ensuring system durability.
• Automated control systems for rapid response during emergencies.

5. How energy-efficient are your tunnel ventilation units?

• Variable speed drives (VSDs) to adjust airflow as needed.
• High-efficiency motors to reduce electricity usage.
• Automated control systems to optimise energy output based on tunnel conditions.

6. Can your ventilation systems be integrated with existing tunnel infrastructure?

Yes, our solutions are fully customisable and can be installed as part of new or existing tunnels. Our engineers will assess the structure and recommend a seamless retrofit solution if necessary.

7. How do you ensure compliance with safety regulations?

All our tunnel ventilation systems comply with international safety and environmental standards, including:

• EU & ISO ventilation regulations
• NFPA 502 (for road tunnels)
• EN 12101-3 (smoke extraction requirements)

8. What maintenance is required for tunnel ventilation units?

• Routine inspections and testing
• Fan and motor servicing
• Cleaning of dust and debris
• Software and control system updates

9. How do I determine the right ventilation system for my tunnel?

Every tunnel has unique requirements, so we conduct a detailed assessment based on:

• Tunnel length and design
• Traffic volume and vehicle emissions
• Emergency ventilation needs
• Power and energy efficiency requirements

10. How can I get a quote for a tunnel ventilation system?