Breathing good, clean air is often taken for granted. However, there can also be invisible hazards in the air. When breathing, speaking, or coughing, aerosols (suspended particles) are formed in the air, which contain infectious viruses and can remain in the air for several hours.

In the open air, such as in a park, the aerosols dissolve relatively quickly into their components due to the movement of air. This looks a little different in closed rooms, as there is often no air exchange. Regular ventilation is recommended for a quick exchange of air. Here you can ventilate the room or ventilate with a draft for a quick and optimal exchange of air. Cross ventilation is used to ventilate via open opposite windows and/or doors.

Air Purifiers help eliminate viruses

Indoors, air purifiers can provide additional protection alongside regular ventilation, social distancing, washing your hands, and wearing a mask. This is important above all in rooms with several people. Unlike ventilation, air purifiers constantly remove viruses from the indoor air and halve the aerosol concentration within a short time. An air purifier not only reduces viruses and germs in the indoor air. It also removes other harmful particles such as house dust and pollen.

Source: Christian J. Kähler, Thomas Fuchs, Rainer Hain, University of the Federal Armed Forces Munich 2020


It has been shown that a relative humidity of 45% minimizes virus activity. However, colder weather in the fall and winter means that people turn the heat up. Heating draws moisture from the air which can cause the humidity to drop below 45%. The warmer the air is, the more water vapor it can retain. Conversely, cold air stores less water and is drier. So in winter, the air is usually drier than in summer.

Source: [see among others W. Hugentobler: Neueste Erkenntnisse zum Einfluss von Luftfeuchte auf Lebensdauer und Verbreitung von Viren, presentation, 17th Forum Arbeitsmedizin, Deggendorf 2016]

In winter if central heating heats up indoor air that is already dry, it doesn’t automatically pick up more moisture. If there is no moisture in the room, the air is unable to absorb any. This is what creates warm yet dry air in heated rooms, which increases virus activity. But opening the window too often in winter is not the ideal solution, as it reduces the relative humidity in the room.

A hybrid air purifier with a humidification function helps you reduce viruses in the air while also ensuring optimal humidity in your rooms. If you seek optimal humidification, as well as purification, then the AH902 Professional Airwasher is the ideal solution. It simultaneously humidifies and purifies your indoor air. In automatic mode, the highly sensitive sensor technology detects and controls both factors completely independently from each other. This ensures optimal indoor air quality as well as a humidity of 40-60%.


  • The performance should match the room size and number of people
  • Not every appliance filters viruses and aerosols out of the air
  • HEPA (high-efficiency particulate air) filters of class H13 or H14
  • If the packaging does not state the filter type, but only particle sizes, this information can help: viruses such as influenza are approximately 0.08 µm to 0.12 µm in size, and the SARS-CoV-2 virus measures around 0.12 to 0.16 µm.
  • Also, check whether the appliance works with ozone. This can release additional hazardous substances into the air.

Air Purifier with Anti-Virus Capabilites

If you want to use an air purifier to filter out viruses and germs, the right combination of filters is essential. That’s why we’ve developed a high-performance yet extremely quiet four-filter air purifier that achieves outstanding results. Our AP902 Professional Air Purifier features two highly efficient, certified H14 filters that reliably reduce the virus load in the air, plus two pre-filters to capture larger particles. 

Venta allergen, virus, and fine dust filters featuring our patented Nelior Twin Air  technology (H14 filters) filter out:

  • Viruses such as the airborne corona and influenza viruses
  • Bacteria
  • Mold spores
  • House dust & dust mites
  • Pollen and allergens
  • Pet hair
  • Skin flakes
  • Hazardous fine dust (PM1)

Venta Air Purifiers

LP60 Kuuboid XL Max Air Purifier

Purifies up to 810 square feet with 99.95% filtration efficiency down to 0.07 microns Five-speed fan with Turbo Boost function Offers excellent energy efficiency, even on Turbo Boost Features a particle sensor designed to monitor your air quality Auto Mode maintains your ideal air quality level Zero ozone or ions emitted 2-year limited warranty Color: White
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AP902 Professional Air Purifier

Air purification for spaces up to 800 ft²* Certified HEPA H14 Nelior filters for particles down to 0.07 µm Coarse dust pre-filters for particles down to 10 µm prolong the life of the HEPA H14 filters Professional PM2.5 particle sensor for real-time air quality display Convenient control with the Venta Home App Air quality display in compliance with the World Air Quality Index *Total coverage area including adjoining rooms, hallways, and stairways. Based on standard 8-foot ceilings.
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AH902 Professional Airwasher

Dual-function air purifier and humidifier for spaces up to 750 ft²* Highly efficient humidification with VentWave 3D technology Certified HEPA H14 Nelior filters for particles down to 0.07 µm Coarse dust pre-filters for particles down to 10 µm prolong the life of the HEPA H14 filters Up to 99.9% sterilization with built-in UVC technology Professional sensor system for real-time air quality and relative humidity readings Convenient control with the Venta Home App *Total coverage area including adjoining rooms, hallways, and stairways. Based on standard 8-foot ceilings.
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