EOL Vent Tunnelling

- feel the nordic wind

EOL Ventsystem

EOL Ventsystem is specially designed for underground ventilation, and offers a complete ventilation system along with expertise for the correct calculations and design of suitable ventilation equipment. Our goal is to be a partner for our customers. EOL Ventsystem supplies system design, axial fans, dampers, silencers, diffusers, VFD’s ducting, ducting cassettes and differential pressure doors. We also supply Trolex gas sensors and Accutron flow meters. Together with our designers we often custom-make solutions to fit for your purposes. The company has been involved in Mining and Tunnelling operations for more than 100 years and offers well-designed products and competence for this demanding industry. The AKRON factory where our products are made, is located in Sweden about 100 km northeast of Gothenburg.

Designed for long lifetimes

The dimensions of EOL Ventsystem can be adjusted to fit your specific needs. One advantage of our products is that we use aluminium alloy hubs and blades, for longer life time expectancy on the motor-bearings. Our fans are hot dip galvanized, and normal range is between Ø500 to Ø2000 mm diameter, with variable hub diameters and motor sizes up to 450 kW per stage. All fans can be delivered as multi stage fans, and they are constructed from a modern module system based on pressure and volume demand. The standard capacity is up to 125m³/s or 4200 Pa per stage.


A right designed ventilation system can reduce energy consumption and increase production. EOL Ventsystem has the knowledge and products for a high-performance ventilation system for all possible Mining and Tunnelling situations. Our fans go through extensive testing according to several ISO standards, in the state-of-the-art laboratories at Akron, who has one of the largest pressure chambers in Europe.

Modular – Frame – System

Our products are designed for a flexible performance with a turn key solution. All the fans are controlled by one control box for all stages in a serial fan station. Fans and silencer can be added or exchanged according to changed requirements of performance regarding air pressure and noise reduction.

  1. Guard – Guard with different sizes of mesh for different applications.
  2. Inlet cone/Bell mouth – Inlet diameter and length as per customer request.
  3. EVS Silencer – Modern design silencer with or without center pod. The silencer galvanized and has a welded frame between the flanges making it a very rugged construction.
  4. EVS Fans – High efficiency impeller with adjustable pitch angle. Fan casing is galvanized and has a sturdy construction with guide vanes specially designed for underground use.
  5. Diffuser –The outlet diameters is manufactured at standard duct diameters. To reduce the fan outlet losses to a minimum, the diffuser can be equipped with an inner cone.
  6. Duct connection – Manufactured at, standard tube diameters.
  7. Starting equipment and frequency converters (VFD’s) – EVS fans can be delivered with different electrical control system to suit customer requirements.
  8. Frames – The EVS Fans are equipped with a separable Modular-Frame System, meaning each silencer and fan chassis has its own frame. This flexible system allows the addition or removal of silencers or fans easy, e.g. from a single stage fan connection to a multi stage fan.

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