According to the World Health Organization, around 47,000 people in Germany die each year because of fine dust. Air pollution caused by fine dust is particularly high in urban areas. The fine dust alarm in Stuttgart has become well known throughout Germany. In fact, due to high air pollution, many cities around the world have introduced fine dust alarms.

Cities sound the alarm due to high fine dust emissions

This is because fine dust is harmful to human health. That is especially true with regard to the smallest particles (PM2.5), which can penetrate deep into the lungs and trigger illnesses. The largest source of fine dust in cities are traffic, households with furnaces, and industrial processes.

MANN+HUMMEL has been a filtration expert for over 77 years. Our R&D engineers continue to develop new methods to remove contaminants from air and liquids. Last year, we started specifically addressing the subject of fine dust in cities with the Fine Dust Eater project. Using fine dust filters at locations where there is a particularly high level of air pollution, or using fine dust filters for vehicles, we want to make a contribution towards achieving cleaner air. This is valid for the fine dust alarm in Stuttgart and also for other cities throughout the world.

Where increased fine dust values have a big effect

  • In cities, people are affected by fine dust generated by traffic, households, and industry. In traffic, fine dust is generated by all vehicles, including petrol, diesel, and electric vehicles. This is because brake, road, and tire abrasion is a larger source of fine dust pollution than that caused by combustion engines for all vehicles.
  • Air pollution is particularly high at locations that have a lot of traffic or high emissions due to chimneys with poor air circulation. This leads to problems with nitrogen dioxides and also to the fine dust limits being exceeded. As a result, these cities can face the risk of lawsuits.
  • The health risks due to fine dust is therefore especially relevant at certain locations within cities. Namely, in places where there are both many people and higher levels of emissions. This applies to busy traffic junctions, railway stations, bus stops, and underpasses.
  • Fine dust also poses a special risk to the health of certain groups of people. People with respiratory diseases, older people, or children should therefore not be exposed to high concentrations of fine dust.
  • In principle, clean air has a direct effect on quality of life. Clean air is a requirement wherever people study, work, shop, or spend their leisure time. No one wants to worry about fine dust limits.


From fine dust to quality of life

How MANN+HUMMEL helps inner cities achieve clean air with filtration

MANN+HUMMEL has been a filtration expert for over 77 years. For us, filtration means separating the useful from the harmful. We are now applying our know-how and passion to clean the air around us in cities every day in order to achieve a better quality of life. We have developed the fine dust filters for this purpose, which are able to help regarding the fine dust alarms in Stuttgart and also with high vehicle emissions and protection for the vehicle occupants.

Using filtration technology to enable clean air in cities

Stationary fine dust filters contribute to reducing the fine dust pollution in cities at locations where there is a particularly high level of air pollution. This is true for locations such as the Stuttgart Neckartor, for railway stations, and for bus stops.
The selective application of fine dust filters from MANN+HUMMEL at kindergartens, hospitals, or retirement homes can help improve the health of these groups.

Tackling fine dust at the source

We also implement solutions at the source. For example, the newly developed brake dust filter from MANN+HUMMEL prevents the emission of 80% of the brake dust that a vehicle generates in the braking process. Mobile fine dust filters can be positioned on the roof or underneath buses or transport vehicles and retain 80% of the fine dust present in the air. These filters can be used to significantly reduce the vehicle emissions of a complete fleet of vehicles.

From fine dust to quality of life

Ultimately, we have a right to the best possible air, particularly at locations where we spend a lot of time. Fine dust filters in areas with numerous office buildings or leisure amenities and shopping facilities help to make the ambient air cleaner and enable a better quality of life.

Using our latest cabin filters, we also protect the occupants of different vehicles against pollen, nitrogen dioxide, and make vehicles the place with the best protection against fine dust in the city.


Filter Cubes

Stationary fine dust particle filters for city areas with high pollution

For such locations, MANN+HUMMEL developed the Filter Cube. Equipped with fine dust particle filters and high performance fans, it is able to actively remove fine dust from the surrounding air drawn in with very low energy requirements.

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Fine dust particle filters

Compensate vehicle emissions through the right filter

Fitted, for example, on the roof or under the floor of a vehicle, the filter is able to remove 80% of the fine dust particles from the air while consuming only a low amount of energy.

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Brake dust particle filters

Preventing the emission of particles into the air directly at the source

The brake dust particle filters from MANN+HUMMEL prevent the emission of particles into the air directly at the source. The filters retain 80% of the brake dust. The filter has applications in cars, commercial vehicles, rail traffic ...

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Cabin filters

The right filter for the interior of the vehicle

The NO2 Fine Dust Combi Filter from MANN+HUMMEL protects the vehicle occupants against such dangers to health which are present in the outside air.

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Fine Dust Eater in action

Fine dust filters at the Stuttgart Neckartor

  • The Stuttgart Neckartor has one of the highest levels of fine dust pollution in Germany. In recent years, this area and its associated  measurement station has garnered negative fame for recording values which continually exceeded the permissible limits.
    Supported by the city of Stuttgart and funded by the Ministry of Transport of the state of Baden-Württemberg, MANN+HUMMEL is now conducting a pilot project to test the use of fine dust filters in this area.
  • By the end of 2018, the project partners will install 17 filter columns, so-called Filter Cubes III, which MANN+HUMMEL has recently developed, along a 350 meter stretch of road at the Neckartor traffic junction in Stuttgart. The filter columns each include three fine dust particle filters and fans which draw in ambient air.
  • Model calculations, conducted by an independent simulation office on the basis of data from the years 2016 and 2017, have indicated the possibility of reducing the total fine dust pollution at the Stuttgart Neckartor. MANN+HUMMEL will now use the pilot project to test whether the Filter Cube can be used to reduce the air pollution caused by fine dust and possibly also to reduce the number of days when the permissible limits are exceeded at the Neckartor.



Who started the initiative?

MANN+HUMMEL approached the state of Baden-Württemberg and the city of Stuttgart. The company has been an expert in the filtration of liquids and air for more than 77 years,  and last year set up the Fine Dust Eater technology platform. The platform includes stationary and mobile filtration solutions which can be used to reduce fine dust pollution in cities.

How do the filter columns work?

Fine dust particle filters and fans are integrated in the Filter Cubes. The fans suck in surrounding air and the filters retain the fine dust that is present in the drawn in air. The fans are programmed only to function when required in order to minimize the consumption of energy. In addition, integrated sensors collect data on the air and weather.

How big are the filter columns?

A Filter Cube III is 3.6 meters high. Three individual Filter Cubes are installed on top of each other in a modular system. These each have a width of nearly one meter.

Exactly where will the systems be installed?

Has the effectiveness been verified?

The project is currently in the test phase. An independent simulation office has made model calculations for the effectiveness of the installation at the Neckartor traffic junction. These simulation results show that the overall fine dust pollution can be reduced.

How long will the project run?

The pilot project is planned to run for two years.

Why was the Neckartor chosen?

The Neckartor was chosen as it is the location with the highest fine dust pollution in Stuttgart.

Is the installation of filter systems also planned for other locations?

MANN+HUMMEL has primarily developed the Filter Cubes for use at locations where there is a high level of air pollution and where there are also many people. The Filter Cube from MANN+HUMMEL can make a contribution towards protecting persons passing by. Filter Cubes are already in operation at the Bleyle complex and in front of the company premises of MANN+HUMMEL, both in Ludwigsburg.

The filters are more effective in closed or semi-closed environments such as bus stops and railway stations.

Contact Persons

Thomas Michalak
Sales & Business Development Manager - Fine Dust Eater