We supply advanced air transport systems for the construction of road, rail, and subway tunnels. Our ventilation tunnels for the construction industry are designed to meet the extreme logistical and technical challenges of modern tunneling processes.
Ventilation of tunnels during the excavation phase requires top-quality materials and reliable air delivery to the work sites. Our ventilation ducts for the construction industry perform exceptionally well even under the most challenging conditions.

Our systems ensure a steady airflow over distances of several kilometers, which is essential when excavating long transportation tunnels.

We design flexible ventilation ducts capable of withstanding operating pressures of up to 15,000 Pa, designed to work with the most powerful fans on the market.

We provide solutions with the largest cross-sections on the market, which are ideal for use with TBMs (Tunnel Boring Machines).

Thanks to the smooth internal surface of the materials, we minimize pressure losses and thereby significantly reduce the energy costs associated with tunnel construction ventilation.

DLD duct connection systems allow ventilation ducts to be extended quickly as excavation work progresses, without wasting time on lengthy ventilation system expansions.

Materials tested in mining, featuring enhanced tear resistance and moisture resistance, ensure reliable performance in harsh underground environments filled with dust and debris.
The quality and reliability of our solutions have been proven in major infrastructure projects, such as the construction of the Paris Metro, the expansion of the Vienna Metro, and the excavation of the Gotthard Tunnel in Switzerland. Our DLD tunnel ventilation systems meet the most stringent European safety and performance standards, which is why we supply them to tunnel construction sites in Germany, Switzerland, Slovenia, Italy, and many other countries across our continent.
Ventilation of tunnels during the excavation phase is absolutely essential for safe working conditions, operational continuity, and fire protection.
Properly designed tunnel ventilation is, above all, the foundation of safety and the continuity of engineering work. The systems supplied by DLD are designed to meet the most stringent design guidelines as well as variable geological and technological conditions.
Find answers to the most frequently asked questions about DLD products for tunnel ventilation, and if you have any questions of your own, please contact us!
We use fabrics with a very low roughness coefficient and airtight joint systems, thanks to which DLD ventilation ducts ensure long-range air transport with minimal energy loss.
Yes, we manufacture ventilation tunnels in various diameters that are resistant to mechanical stress (dust, debris), making them fully suitable for use both near TBMs and with other tunneling technologies.
Of course. Our experience with subway tunneling in Paris and Vienna demonstrates that our solutions are capable of meeting the highest safety and quality standards set by general contractors for underground infrastructure.
Tunnel boring requires a well-designed ventilation system at every stage of construction. As an experienced manufacturer, we supply ductwork that ensures adequate air exchange - a solution that has been highly valued in the construction of Europe’s largest tunnels.
Do you need a reliable air supply system for the tunnel boring phase? Tell us about your project, and our engineers will prepare a comprehensive proposal tailored to your project schedule.