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Virus air cleaner

Filters against viruses and germs

What do air filters do?Buero Konferenzen

Viruses, bacteria and other germs are not only found on surfaces, but also in the air, especially indoors. Do people come into rooms such as B. in offices, classrooms, restaurants or fitness studios together, aerosols and thus viruses float through the room. these droplets can float in the air for hours and lead to infection even when the infected person is no longer in the room.

An air purifier reduces the concentration of viruses and germs and of course other pollutants such as dust, pollen and allergens that are in the indoor air. In this way, they can also help to significantly reduce the concentration of the current coronavirus in the room air.

Requirement: Use of air purifiers with HEPA H14 filters

It makes sense to use hepa air purifiers with H14 filters for viruses and germs. These have a permeability of 0.005% and should be set up to remove pollutants from the air, especially in highly frequented areas such as waiting rooms in medical practices, offices, schools, canteens or production plants. Air purifiers with HEPA H14 filters are also used in hospitals and laboratories.

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Effect of filters against viruses

Viruses have a size of 0.05 µm to 0.12 µm and in the area of transmission via the airway, i.e. droplets and aerosol, they are combined with other particles, such as saliva or suspended matter and form so-called conglomerates. These are also called germs and usually have a size between 0.4 µm and 0.5 µm. Influenza viruses usually have a size between 0.08 µm and 0.12 µm. According to the current state of scientific knowledge, the SARS-CoV-2 (corona virus) is somewhat larger at a maximum of 0.160 µm.

HEYLO air purifiers with H14 filters work effectively against coronaviruses.

In principle, the suitability of filters for virus applications begins with class H 13 and the more reliable separation of germs (conglomerates) is achieved by using at least H 14 filters. These have a separation efficiency of 99.995 %, with a test particle size of 0.3 - 0.5 µm, which is 10 times higher than that of H 13 filters. Also hospitals and laboratories commonly use this filter class. Therefore, our devices (PF 1000, PF 1400, PF 3500, HL 400, HL 800) with a certified H 14 filter are able to reduce the amount of germs in the air considerably and thus also reduce the risk of infection.

Mobile virus protection wall HEYWALL

VirenschutzwandIn reception areas, counters and cash registers, in offices, workshops, vaccination centers, hospitals, authorities and wherever there is public traffic, the HEYWALL mobile virus protection wall effectively helps to maintain the minimum distance. The flexible module system consists of aluminum bars up to 5 m high, which, together with a film and a practical entrance or exit, create a hygienic barrier with a self-adhesive zipper.

The mobile virus protection wall is the optimal hygienic protection for different areas such as the construction of locks in nursing and old people's homes, shopping centers or clinics, the spatial separation in buildings or the partitioning off of individual, small areas such as in canteens or restaurants. Thanks to the quick assembly and disassembly, the protective barrier can be easily rearranged at any time and rebuilt after disinfecting cleaning (e.g. with HEYLO hand and surface disinfection).

  • Fast and flexible protection against droplet infection.
  • Flexible module system for a ceiling height of up to 5 m.
  • Tool-free use and assembly in a few minutes, easy to install without a ladder.
  • For separating rooms and sub-areas as well as for building protective walls and sluices.
  • Installation as a room divider, in L or U shape or polygon. All angles are possible.

This makes our corresponding systems for air cleaning very effective and a useful addition to the usual disinfection measures.

Mode of action of H 14 filters and their effectiveness with regard to the corona virus

Air that we breathe out can contain viruses. Just as influenza viruses are detectable, SARS-CoV-2 is also detectable in the exhaled air of an infected person. Viruses such as influenza (with a size of 120 nm) and SARS-CoV-2 (with a maximum size of 160 nm) do not move around in the air in isolation, but are enclosed in larger droplets. They therefore move in the form of an aerosol. When breathing, every human being emits tiny droplets (of a size of 1 µm). Each breath can contain 1,000 to 50,000 droplets. When coughing, the droplets are ten times larger (over 10 µm). Thus, a filter is able to eliminate over 90% of the suspended particles*.

Filter GrafikThe HEPA filter H 14

The HEPA filter of class H 14, tested according to DIN EN 1822, are used in medical areas such as intensive care units and laboratories as well as in clean rooms. The choice of filter class depends on the particular application.

HEYLO filters: made in Germany

Our filters are EN-compliant and certified. H14 filters catch 99.995% of all particles from a size of 0.1 µm, so that viruses such as e. B. Coronaviruses are rendered harmless.



 filter class
E 10
E 11
E 12
H 13
H 14
Separation efficiency
> 85 %
> 95 %
> 99,5 %
> 99,95 %
> 99,995 %
Separation efficiency
> 99,75 %
> 99,975 %


Especially for non-professional applications (e.g. vacuum cleaners), there is a wide range of filters on offer that bear the designation HEPA in their name but do not guarantee the mentioned specifications of the EN-standards. For this reason, it should be checked carefully before each use whether these are certified H 13 or H 14 filters. Test certificates of individual tests are available for these filters. Please contact your supplier.

Conclusion: If we assume that the corona viruses in the air are enclosed in droplets, and these have a size of 1 to 10 µm, H 13 and even better H 14 filters can significantly reduce the virus concentration in closed rooms and contain the risk of infection.

How do air purifiers work?

air purifier worksContaminated air is sucked in by the air purifier with the aid of a fan and passes through various filters. Coarse particles up to 3 µm are separated by the pre-filter. Depending on the application, an M-class fine dust filter for particles up to 1 µm and a degree of separation of 99.9% or a particulate filter (Hepafilter) with a degree of separation of 99.995% can be used as the main filter. In addition, carbon filters can be used to neutralize odors. Depending on the device, two to three filter levels are possible.

Recent studies have shown that devices with appropriate filter combinations are able to effectively eliminate virulent aerosol clouds. Appropriate devices with class H14 filters ensure that the aerosol concentration in rooms can be reduced to a low level within a short period of time. In rooms where people meet, such as schools, offices, shops, waiting rooms, club rooms, fitness studios, lounges and dining rooms, etc., air purifiers are a useful technical solution.

Installation of the air purifier

The use of air purifiers makes sense where a larger number of people and / or changing people meet. The examples show where an air purifier can be placed in the room in order to be able to thoroughly clean the room air.

In addition to the correct placement, the issue of volume must also be taken into account. Which dB (A) value is appropriate depends on the situation, but also on the acoustic conditions of the room. Talk to us, we will determine the right device based on your situation.

How is the correct number of devices calculated?

In order to achieve the best possible effectiveness of the air purifier, the installation location in the room and the room conditions such as room volume, air flow and air currents in the room must be taken into account. The cleaning performance must match the size of the room and the number of people. The direction in which the air is drawn in and blown off through the air cleaner is also decisive for the air cleaner to suck in a significant proportion of the room air and render viruses harmless.

According to studies on efficient air purification, the volume flow must be at least 6 times the room volume per hour. The air exchange rate indicates how often an air purifier should circulate the air in a room per hour. An air purifier is no substitute for regular ventilation.

Luftfuehrung Luftreiniger


Example calculation with the HEYLO PowerFilter 3500: When the device runs at 50% power, it has a volume of 55 dB (A). With the H14 filter it manages 1,068 m³ / h. Assuming 6 air changes with a ceiling height of 2.40 m, the device could be used for a 75 m² room.

Correct air flow

The air purifier should be placed so that it can capture the air in all areas of the room. The device sucks in the contaminated air from all directions at the bottom of the housing. The air is cleaned and blown clean and free of viruses towards the ceiling. An air cylinder is created, which ensures that clean air is distributed throughout the room.

Disposal of the filters

When do filters have to be changed?

The filter change indicator in the HEYLO air purifiers shows when a filter needs to be changed. Full filters can no longer filter hazardous substances and should definitely be changed. First only the pre-filter should be changed. If the filter change indicator is still lit, the main filter (H14 filter) must be replaced. To activate the filter display, it is necessary to set the device to full power for a short time. The filters should be replaced as soon as the warning indicator lights up. In hygienic applications, we recommend replacing the pre-filters monthly and the main filters 1-2 times a year, regardless of the device's warning display.

Filters contaminated with pollutants must be disposed of in accordance with their respective regulations. They must be packed airtight in disposal bags and can then be properly disposed of. According to the current state of knowledge, coronaviruses survive on surfaces for a maximum of 24 hours (Lower Saxony State Health Office). However, if the filter should be changed immediately after operation, precautionary measures must be observed.

Step by step instructions for changing the filter:

  1. When the filter change indicator lights up, switch off the device.
  2. Put on gloves and mask.
  3. Spray the front of the filter with HEYLO hand and surface disinfectant.
  4. Remove the filter and put it in the disposal bag.
  5. Dispose of the disposal bag in the household waste.

 virus air cleaner


The HEYLO virus air cleaner ensure clean room air and a healthy working environment.

Find the right air cleaner against viruses and bacteria quickly and easily.


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HEYLO air cleaner in the fight against viruses and bacteria

Virus protection package SET070

Virus protection package 
| HEYLO article number SET070

consisting of:

1 x air cleaner PowerFilter 1400
1 x pre-filter dust class G4
1 x HEPA filter class H 14
1 x disposal bag for filter



(*Source: https://www.lungenaerzte-im-netz.de/krankheiten/covid-19/was-ist-covid-19/)