VFA Land And Sea

ASPRA Air Purification

Pure Air Solutions

ASPRA Air Purification

What does the ASPRA technology purify?

There are many different air contaminations that influence the air quality. These contaminations are the particles that are removed effectively from the air by the ASPRA technology. This is done without the use of conventional textile filters or other expensive filters. The technology uses an open structure ASPRA collector. Contaminations from the air that are removed by the ASPRA products are:

ASPRA technology

The ASPRA is a revolutionary application for air purification. The system applies a very high air purification efficiency (up to E10-11/HEPA classification according to NEN-EN 1822 standard), without using a HEPA filter. As a result, the ASPRA has 80% less pressure drop compared to conventional filters, hereby realizing substantial energy savings compared to conventional filters. The ASPRA only charges particles inside the application, and captures them directly on the own open structure filter (a collector). No harmful radicals are produced. 


The ASPRA is a modular system with diverse models and application possibilities. The ASPRA is available in various standard versions, but can easily customized to the specific requirements of the customer. Providing tailor-made solutions to ensure an optimal solution.

Pure Air Solutions

ASPRA Benefits


The products from the ASPRA series are tested by several independent institutions such as TNO, VITO and ECN. Tests confirm the air cleaning efficiency of the ASPRA technology is 97-99% of atmospheric particles in the range of 0,1-10 micron. (PM10, PM2.5, PM1, PM0.1 / ultra fine particles).

How does the ASPRA technology work

The air is led through the tube either by using a built in fan or by using the existing air flow in a ventilation shaft. In the first part of the tube, the air is exposed to an ionizer. The ions charge the particles (from particulate matter to gasses, emissions, VOC’s and microbiological contaminations) causing them to attach to a specially designed dirt collector. What remains is purified, clean and healthy air.

Charging the particles before catching them allows us to use a coarse collector instead of a dense filter. This way we use much less energy for pushing the air through the dirt collector while achieving high filter efficiency. Replacing the dirt collector is easy and can be performed by anyone.contaminations) causing them to attach to a specially designed dirt collector. What remains is purified, clean and healthy air.

The difference between ASPRA and other air cleaners and ionizers

Clean air is made possible by tackling the source, but also purifying the air. There are many different air purifiers on the market. These are often equipped with a standard filter. But there are also newer, efficient techniques, such as air cleaners with ionisation. We explain what the difference is and what you should pay attention to.

With a standard air purifier, a fan is used to start an air flow. The airflow is then passed through a filter in which air pollutants are captured and the air quality will improve. The smaller the particulate matter particles, the more dense filters should normally be to capture the (risk) particles. A point of attention is that the filters must be regularly cleaned / replaced. They are full and pollution is accumulating. The fan has to work harder and that results in more energy consumption, lower capacity and more noise. In addition, many filters are made of moisture-containing materials such as textiles or fibers, where bacteria can start to grow.

Ionization is a newer technique with many developments. It is an innovation that is used more and more often, for example from the point of view of sustainability and energy saving.

There are many air cleaners on the market that use ionisation. There is a difference between air cleaners that use positive ionisation and negative ionisation. Ionisation (positive or negative electrical charging of atoms or molecules) provides ions that, when attached to dust particles, produce charged dust particles. Loaded dust particles then stick more easily on all kinds of surfaces.

In addition, there is another difference in air cleaners with ionisation, namely air cleaners that charge electric particles (without filter) and air cleaners that charge electric particles, but also capture them immediately. The first is called open ionization (1) and the latter is called closed ionisation (2):

(1) Open ionization:

The charged particles are spread into the room and they themselves look for a surface to be deposited. They thus deposit on all surfaces in the room such as furniture, ceiling, walls, appliances, but certainly also our lungs. These systems create many charged particles, but also free ions, which are often negatively charged. This is then called negative ionisation. Negative by-products are also created in negative ionisation, such as ozone, free radicals and free ions. Although they contribute to reducing odor, they are also harmful to health. Research shows that charged particles can settle into lungs up to 5 times more easily than non-charged particles.

(2) Closed ionization:

The charged particles are captured on a special surface in the system itself, so that no particles are blown into the room and can therefore not settle on other surfaces. With closed ionisation, there can be both positive and negative ionization. The capture surface can be of various materials, such as conventional filters, metal plates or special open structure filters. The advantage with air cleaners that capture particles with a special open structure filter, is that it does not become clogged and less energy is needed to move the air through this filter. A good example of air cleaners with an open structure filter are the ASPRA air cleaners from VFA Solutions B.V.

Part of the odors are removed by the capture of particles. For specific and targeted odor removal, VFA Solutions additionally applies an extra special gas adsorption filter directly behind the ASPRA open structure filters. This gas filtration section is specially selected on the basis of the type and concentration of the gases and odors present and can differ per industry and even per customer. By placing VFA gas filters behind the ASPRA particle filters, the gas filters are protected against dust, making them more effective and have a longer service life.

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If you like to learn more about improving the quality of the air you breathe, contact us today!

+31(0)10 - 427 87 33

Admiraal de Ruyterstraat 2
3115 HB Schiedam
The Netherlands