EOL Ventsystem was founded in Sweden in 1890 under the name Carl Ström Gruvteknik, and has been distributing mining- and tunneling technology for mines ever since. The focus on ventilation solutions grew forth during the decades, and in 2002, we changed name to EOL Ventsystem (after the Greek-Roman god of wind, Aiolos) to reflect our today we stand as one of northern Europe's most trusted and sought-after underground ventilation providers. 

EOL Ventsystem develops, builds and implement highly customized underground ventilation systems for mining- and tunneling clients of all sizes all over the globe. 

We currently have clients in 15 different countries all over the world, working with clients in all types of mineral mining, infrastructure tunneling among others, and entrusted with the complete ventilation of the world's largest underground iron mine. Read more about our project history here. 




  • Complete ventilation systems that fulfill the necessary environmental demands, laws and regulations for underground construction and mining. 
  • Top-quality, highly-customizable, energy efficient and durable fans (up to 450 kW per stage) - made according to your needs. All fans are made using 100 % renewable energy, further improving the sustainability of your operations. 
  • High pressure ventilation doors, that make sure your air stays where it should.
  • ABB Smart Vent VOD (Ventilation On Demand) that measures your site's ventilation needs in real-time, and provides just the right amount of air where- and when it's needed. Read more about our VOD-solution further down on this page. 
  • Specially designed electrical cabinet with VFD (Variable Frequency Drives). It helps the EOL Ventsystem regulate and adjust the energy used for your mine's ventilation, making sure your ventilations capacity usage never exceeds the actual needs. 

All EOL Ventsystem fans are designed with a separable Modular-Frame–System. This flexible system allows for easy addition or removal of fans or silencers, and enables a serial fan connection for increased performance if necessary.

The design of the Eol Ventsystem consists of blending our core components, provided by our trusted long-term partners, along with a wide variety of customisable components available from a wide selection of providers.

Thus, we can always guarantee predictable top-quality performance in every project, while also providing the customization that fits perfect for your special conditions.

How we calculate your exact ventilation needs:

We use highly precise simulation software as one of our tools to determine the exact ventilation needs of your mine or tunnel, making sure that your air demands are fully mapped beforehand.

We then proceed to construct the proposed solution, fitting your calculated needs with the right fan prestanda and suitable equipment, so that your air needs are fully met while your energy costs are kept as low as possible. 

AKRON fans - the core of our system

As the backbone of the Eol Ventsystem, we rely on the unrivalled top-quality fans provided by our strategic partner Akron. Akron has more than 60 years of experience in the industry, having put over tens of thousands of hours into their research and development, constantly optimizing and perfecting their own fan technology. This makes them stand out clearly among ordinary standard fan providers, and makes Akron the perfect fan provider for Eol Ventsystem

Akron's extremely wide selection of available fan sizes, fan types and capacities also fit perfectly with Eol Ventsystem's vision to provide your site with a fully customized solution fit for your precise needs, and their unique modular frame system makes both customization and future maintenance as easy as it can be. 

Combine this with their strong environmental profile and their choice to have the fan production be fully self-sufficient in renewable energy, and we have more than enough reasons for Eol Ventsystem to be proud partners with Akron.

ABB Smart ventilation - our VOD-cooperation with ABB

Our independence from any specific actor enables us to cooperate freely with the suppliers we find to be the best on the market, in order to achieve the perfect ventilation system for our clients. One such successful cooperation is the one we have with the well-renowned Swiss-Swedish engineering group ABB.

Together with ABB, we provide the ABB Smart Vent Ventilation-On-Demand (VOD)-solution, made to help you avoid unnecessary, uncalculated and wasteful "standard" ventilation solutions, which more often than not helps you cut the energy costs of your sites ventilation in half. 

The ABB Smart Ventilation VOD-system can calculate and adjust the exact air flows in specific parts of your site, for example when a vehicle passes through, making sure that hazardous substances are effectively diluted with fresh air where it's needed. This while also making sure that capacity is conserved wherever it can be, saving massive amounts of energy compared to standard ventilation systems.

The ABB Smart Ventilation VOD-system, paired together with the EOL Ventsystem fans, is a recipe for high ventilation prestanda for your site, a healthy and safe working environment for your personell, minimized energy expenditures, and long-lasting durable quality that makes up an investment that pays for itself quickly and many times over.

Sandvik Optimine® - Our new cooperation with Sandvik

We are proud to announce that one of Eol Ventsystem's newest components are provided by the world-renowned Swedish technology and engineering group Sandvik AB. Started in 1862, Sandvik has more than one and a half century's experience as a global provider of high-technology and tools and tooling systems within mining among many other industries.

With a long history of letting customer-focused R&D lead the way to becoming- and remaining a global market leader through the decades, Sandvik shares many of EOL Ventsystem's core values, and provides the kind of top-tier, high quality components and technology that make the perfect fit into the EOL Ventsystem.

Sandvik's software solution OptiMine® is one of the latest additions to the EOL Ventsystem. OptiMine® - recently winning first prize in the Software category in The Mining Magazine Awards 2018 - is a powerful suite of digital tools for analysing and optimising your mining production and processes. It integrates all relevant data into one source, delivering both realtime and predictive insights to improve your operations.

The different Sandvik OptiMine® modules can be combined as needed to build up the required functionality and to optimize your mining operations. With open interfaces, the solution can also be integrated to other mine IT systems, making it highly flexible and easy to adjust to your unique needs and pre-existing systems, and making it a smooth and natural part of the highly customized EOL Ventsystem.

The OptiMine® systems include OptiMine® 3D Mine Visualizer, a module which provides a three-dimensional model of your mine on your screen. The entire mine can be viewed and examined both inside and outside. This improves situational awareness, as information about the mine can be easily studied and understood at a single glance.

Another component is the OptiMine® Location Tracking, which provides accurate real-time location data for all mobile fleet in the mine, including mining equipment and light vehicles from other manufacturers. The data is collected locally by the location tracking unit, with no need for any additional production area infrastructure. Whether in a control room or underground in the mine, OptiMine® Location Tracking module keeps you constantly aware of the status and location of your fleet on 2D/3D models of the mine.

While OptiMine® Sandvik's suite of digital solutions tracks, controls and monitors the equipment, people and environment underground at your mining site, the rest of the EOL Ventilation system responds immediately as conditions change, providing precisely the right amount of air at the right place and time.

Compounding these two powerful systems on top of each other means you will gain the highest possible level of insight, optimization and efficiency possible in your mining operation, leading to smoother operations, higher yields, and an optimized and safe underground environment and minimized energy costs. 

The RMS Silencer - extreme attenuation, for silent ventilation

EOL Vent aerodynamic RMS-Silencer (Rectangular-Modular-Silencer), attenuates transversely going sound waves and is designed for extreme attenuation in harsh environments.

The attenuator's large total cross-sectional area, and the aerodynamic design of the baffle’s
in- and outlet ends, sees to make the air resistance extremely low, with a minimal of self-generated

The RMS-Silencer is offered in five basic sizes, with one, two or four modules. Each module
from width x height = 1200 x 1200 to 2400 x 2400 mm. Each module length is 1400 mm, hence
the silencer is offered in three lengths: 1400 mm, 2800 mm and 5600 mm. 

The RMS-Silencer is galvanized, but special orders can be made for components made of stainless steel, which can be useful for exhaust installations in mines or other high-humidity environments. 

Noise recuction (dB) in octave bands: v = vertical (baffles), h = horizontal (baffles):

Frequency (Hz)









One module, v

L = 1400 mm









Two modules, v + h

L = 2800 mm









Four modules, vv + hh

L = 5600 mm









Some of our other suppliers

We are a proud reseller of Trolex instruments. As a provider of top quality mine safety technology with many years expertise in making hazardous mining environments safer, Trolex' tools and technology makes a perfect fit as part of the EOL Ventsystem solution. 

As part of our solutions, we are using Accutron instruments. They provide us with a wide array of mine safety products, keeping our clients' tunnels and mines safe and helping us measure the needs for ventilation in real time. 

Tuntec is a Scandinavian supplier of ducts for underground mines and tunneling, and their high-quiality products are a part of our full EOL Ventsystem solution.  


We have the expertise and the experience necessary to help you get the most durable underground ventilation system, the highest productivity, and the lowest energy costs possible. Send us a message, and we'll talk more about how we can help your project reach its next level in the near future.