About Ventiflex ventilation systems

Our three flexible ventilation systems, Ventiflex Air, Ventiflex Duo and Ventiflex Shaft, are among the most innovative in the world for mines and tunnels.

The art of transporting fresh air

Our three flexible ventilation systems, Ventiflex Air, Ventiflex Duo and Ventiflex Shaft, are among the most innovative in the world for mines and tunnels.

When Protan introduced Ventiflex in 1949, we were the first in Europe to provide flexible ventilation ducts for mines and tunnels. Since then, we have built an extensive know-how and broad-based experience that form the basis for today's worldleading products and solutions.

Flame retardant and self-extinguishing

All our systems are made to measure for every project and come in five different duct qualities. All our duct qualities are flame retardant and self-extinguishing. Two duct qualities also have antistatic properties and have been specially developed for environments where highly flammable gases may occur.

Driving force

We work constantly to drive the development of ventilation technology in mines and tunnels forward. We are members of NTN (Norwegian Tunneling Network), and offer comprehensive training and user support for our Ventiflex customers. We enjoy a close dialogue and good working relationship with our customers, and the training includes installation, suspension and repairs.

Several hundred kilometres every year

Together with our partners, we supply several hundred kilometres of ventilation ducts every year for mines and tunnels in exciting and demanding projects in Scandinavia, Europe, South America, Asia, Africa and Australia.

Innovation and environment

We are constantly working to offer the best duct quality through innovation and continuous improvement:

  • Excellent durability
  • Great flexibility
  • Low weight
  • Simple handling

We always focus on health and safety. The materials used in our ventilation ducts are therefore flame retardant, self‑extinguishing and resistant to chemicals. All our ventilation ducts are recyclable and come in a colour that reflects light in tunnels and mines.

Production and quality assurance

Ventiflex is manufactured at our two factories in Norway. The coated textile is produced in Drammen, while the ducts are made in the factory at Nesbyen. Our factories and ventilation systems are approved and certified in accordance with ISO 9001 for quality and ISO 14001 for environmental management. This means that our entire value chain and all our ventilation solutions are documented as being of a high standard and having a minimal impact on the environment, both locally and globally.

Development and testing

We develop and test all our solutions and qualities at our laboratory in Drammen. It is approved by Det Norske Veritas (DNV) and follows strict testing and documentation procedures. All our systems undergo exhaustive inspection and quality control prior to delivery.

2.5-kilometre test tunnel

We also carry out testing in a real tunnel environment so as to guarantee the quality of our products and solutions. Among other things, we have access to a 2.5-kilometre test tunnel, which we use to improve our duct systems.

Did you know that...

… in the old days, birds were used as an early warning system in mines? If the bird in the cage hanging in the gallery stopped twittering, there was clearly not enough oxygen and the miners would have to get out.