Effective protection against COVID-19

Analyses suggest that Coronaviruses exist for 10,000 years or even more. * Experts warn that this current version of the Coronavirus won't be the last. The minimal infectious dose (MID) to get Sars-CoV-2 is not researched yet. However, coronaviruses are known to be more contagious than the seasonal flu. 


Aerosols are the main suspect to spread contagious diseases

Droplets and smear infections

Aerosols compared to...

Approved separation MPPS EN 1822

The separationefficiencyof TBH H13 particlefilters (HEPA filters) in TBH filter and extraction systems is  aproved in accordancewith EN1822.

The filter separates all particlesupto 100%, which are smaller than 0.1µm and larger than 0.3µm. Particles in between are so called „MPPS = most penetrating particle size“ and are separated up to 99.95% effectively.

Aerosols are 5µm and therefore much bigger. They are separated to up to 100% effectively.

Further information

Safety in occupation and health protection


  • fulfills the protection level for safe extracting and filtering, which is required in accordance with TRGS 528 guideline
  • TBH systems concept is especially tested by the Institute forOccupationalSafetyandHealth (IFA) in accordance with DIN ISO 15012-1 (2013) and 15012-4 (2016) approved.
  • meets high safety requirements
  • safe filtration of smoke, vapors and dust with particles in micrometer range.
  • labeled with W3 and DGUV seal
  • low-contamination dust disposal
  • molecular sieve against gaseous pollutants
  • flexible extraction arm

DGUV recommendations on proper ventilation at workplacesfrom 14th September 2020


  • Regular ventilation with the entire window being open for 3 minutes in winter, 5 minutes in spring/autumn and approx. 10 minutes in summer.
  • Adjust the ventilation intervals to the amount of people, e.g. for offices every 20 minutes.
  • For checking air quality, a CO2 traffic light can help measuring the CO2 concentration. Alternatively, the CO2 concentration in the room can also be calculated, e.g. with the CO2 app of the DGUV.

Safety suggestions

For capturing and avoiding emissions that are hazardous to health


  • Place the extraction system or the detection element as close as possible to the patient or the treatment site.

  • If possible, place guiding elements such as Plexiglas panels or walls to limit the extracting area.

  • Use adequate PPE to change filters.

  • If possible, change the filters in a separate room.

  • Use a disposable pad when changing the filter.

  • Immediately, pack the used filter in a sealable packaging, such as a plastic bag, and seal it.

  • Have suitable practice and hospital standard cleaning agents available for cleaning the extraction system and the surrounding area.


Yes, because according to the current state of knowledge the coronavirus has a size of max. 20-160nm and is therefore larger than laser particles (>=10nm), for which our systems are currently mainly used. TBH filter and extraction systems can effectively extract coronaviruses and filter them out of the air. This prevents the viruses from spreading through the air and settling on surfaces through which people can be indirectly infected with the SARS-CoV-2 virus.

H13 filters from TBH are tested in accordance with DIN EN 1822 and therefore offer safe quality. They filter 99.95% of all harmful particles (0.1-0.3µm), including coronaviruses. In comparison, a mask of class FFP3, in accordance with DIN EN 149, only retains 98% * of these particles (0.6µm). The DGUV recommends using an extraction for personal protection before wearing suitable protective equipment. H13 filters offer sufficient protection. They have lower pressure loss,  compared to the H14 filter, and thus a better energy balance as well as a longer service life.

*Quelle: Berner Safety

Yes. The 99.95% separation efficiency in H13 filters relates to particles of the "most penetrating particle size" (short MPPS, or in German "most penetrating particle size"). These are particles, sizes between 0.1-0.3 µm, represent, the so-called “worst case” for the filter's separation efficiency. Particles that are outside this spectrum, i.e. larger or smaller, are 100% captured by the filters due to various physical effects (according to EN1822).

When changing filters, do that in a separate room, wearing adequate PPE. Use a disposable pad when changing the filter. Put the used filter into the airtight transparent bag, which is included in the system`s delivery, and seal it.

Filter service lives are very dependent on the application and therefore, cannot be predicted generally.

Normally, the change takes place according to the filter status display on the system.

In medicine / dental / aesthetics applications, the filters have to be changed at least every ½-year due to the bacteria / nucleation. We recommend, regardless of the filter status display, the following filter change intervals:


Replace pre filter mat
Replace main filter


The exchange takes place regardless of the filter status display for the following reasons:

Possible contamination of filter with viruses and the growth of fungi and bacteria on the surface. Biological contamination cannot be monitored via the filter display.

Saturation of the activated carbon with process gases and their aging (even with a low pollutant content). This cannot be monitored via the filter display.

The InLine filter has to be changed and disposed after each use.

TBH filter and extraction systems are not a medical device in accordance with §3 Art. 1 of the MPG (German Medical Products Law), because the systems do not come in contact with the patient. The systems extract the particles safely from the ambient air and serve primarily the occupational safety than patient’s safety. The systems have no therapeutically use. Therefore, they do not need a medical approval according to the European standard DIN EN 60601-1.

Yes, we have prapared a flyer for you. This TBH Corona protection PDF contains all information shown on this site. 


The extraction arms can be easily disassembled and then placed in a tub with disinfectant cleaning solution (observe the manufacturer's instructions). After a short exposure time, clean the arms with a nylon brush and then disinfect them (scrub disinfectant).

Watch our video of how to clean the extraction arm. 

U15 filters (degree of separation 99.9995) have a 3-time pressure loss compared to H13 filters (degree of separation 99.95), which leads to a weaker extraction capacity of the system. Much more important than two decimal places in the degree of separation is to capture the aerosols / particles at the point of origin, for which an appropriate extraction power is required. A H13 filter guarantees more safety and efficiency against viruses, bacteria and aerosols over a longer time than a U15 filter.

In addition to the filter performance, the most important thing for the efficiency of an extraction system is correct capturing at the point of origin. If it is too far from the source of aerosol formation, a high degree of separation will not help either. This process is comparable to a sieve that can only filter what goes through and not what passes it. It makes no difference whether a UV-C light lamp or another antimicrobial device is used additionally to extraction. TBH filter and extraction systems have a H13 filter that captures 99.95% of the hard-to-separate particles in the spectrum 0.1µm - 0.3µm, as well as 100% of larger and smaller particles. Therefore, they already offer the best possible protection - not only against particles but also against viruses and bacteria.

UV-C light lamps in addition to extraction systems with TBH filters are not necessary. Correct capturing is crucial for efficient extraction.

The system is delivered ready for use. After installing the extraction arm, the system is ready for operation.

Activities should preferably be relocated outdoors to protect against potential infection with the coronavirus. Particles can spread further and faster outside than in closed rooms. The virus is very temperature resistant, i.e. it survives at refrigerator temperatures of 4-7° C as well as at midsummer’s 30° C and more. Even at such high temperatures, the virus remains infectious for a long time on surfaces. High humidity allows the coronavirus to spread more, while low humidity slows it down, i.e. when it evaporates, it becomes smaller very quickly. Within the first hour, drought reduces the infectivity of the viruses by 100 times. It then slowly continues to drop, regardless of the temperature. UV light destroys the coronavirus as well.

Contact & Services

Find the quick contact to our headquarters and customer services

Business hours

Monday - Thursday 08:00 - 17:00 h
Friday 08:00 - 14:00 h

General contact information

Do you have questions  regarding our products, services or company?  

Please feel free to contact us at any time:  just use the contact information below or send us your request via the contact form!


Direct contact:

Telephone: +49 7082 9473-0
Telefax: +49 7082 9473-20

Home address:

TBH® GmbH - Absaugtechnik, Filtertechnik, Umwelttechnik
Heinrich-Hertz-Str. 8
DE-75334 Straubenhardt

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Frequently asked questions

All important at a glance

Filter and extraction systems deal with a topic that is important for everyone, but can also cause confusion. Therefore, we have created a list of the most frequently asked questions exclusively for you.


Brief explanations of the most used terms

Since there are many terms on our website, which may not be commonly known by everyone, we created this list of the most used words in filter and extraction technology, and their respective explanations. 

Things to know

The essentials in a nutshell

Our systems are for your protection. We take care of your health, the environment and longer machine running times. Find out the reasons why filter and extraction systems are so important .


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