High-frequency air purifiers from Citycool create clean air for customers and staff

An important hygiene component for protection against air-born infections is keeping the room air free of viruses through effective air purification with professional solutions such as the high-frequency air purifiers from Citycool.

As various scientific studies have shown, viruses such as Sars-Cov-2 can survive aerosol-bound for several hours in the air and retain their infectious effects. This is also true for other pathogens, such as influenza viruses. As the number of people in the dining room increases, so does the risk of becoming infected with pathogens through the inhaled room air. The presence of only one infected person, who may not even be aware of the infection, is enough, and the place can quickly become a contagion hotspot.

Partition walls can only be used to separate people, but not the air contaminated with viruses. Because partitions made of plexi-glass or other constructions and also mouth-nose protective masks protect against the direct "virus spray" but not against aerosols contaminated with germs that are released into the air when speaking and exhaling, present for several hours floating freely as an aerosol cloud.

The combined use of masks and partitions is a first important approach to reduce the risk of direct droplet infection with the SARS-CoV-2 virus. However, this measure alone does not protect against a much greater risk of infection - the aerosol clouds floating freely in the air!

After all, airborne viruses do not know any distance rules: For example, when speaking, in addition to large, visible droplets as a kind of virus spray, people also emit tiny aerosol particles into the room air to a much greater extent, which are invisible to the naked eye.

The aerosol cloud of released droplets - comparable to fumes - spread several meters high throughout the room in question and in this way easily overcomes the physical barrier of a spit protection or partition, which is why the aerosol particles can easily get into the airways and eyes of other people present.

High-frequency air purification works exactly where the greatest danger lurks

If the room air can be kept free of germs and viruses, then the risk of airborne contamination is minimized. Citycool high-frequency air purifiers such as the TAC V + have been developed precisely for this task: They effectively and quickly reduce the hang time and intensity of aerosol and suspended matter clouds in closed rooms and thus create a work place for employees and guests with a greatly reduced risk of infection.

The mobile air purifier TAC V + creates a clean “clean zone area” flushed with virus-filtered clean air directly. In this zone, the ambient air remains largely free of airborne germs and viruses, because the TAC V + enables the large-volume intake of contaminated room air with effective H14 HEPA filtering and a flexibly adjustable zone flushing with virus-filtered clean air, free of aerosol particles.

Effective on bacteria and virus conglomerates

Citycool high-frequency air purifiers are equipped with HEPA class H14 filters, which separate more than 99.995% of all fine suspended particles larger than 0.1 µm and have a permeability of only 0.005%. In other words, only five out of 100,000 particles pass through the H14 filter. Similar high-performance filters are also used in operating theaters, clean rooms and hygiene-sensitive areas for clean air production. 

Known virus strains such as the SARS-CoV, the MERS-CoV or the Covid-19 have a particle size of 0.005 µm to 0.1 µm. Usually combined with other particles, such as saliva, suspended matter, etc., they form conglomerates with a size between 0.4 µm and 0.5 µm. These conglomerates are also known as germs and are reliably separated from the Citycool H14 air purification filters.

All H14-HEPA filters from Citycool meet the highest quality requirements that are mandatory when filtering bacteria and viruses:

  • Each H14 high-performance filter is individually tested and given its own serial number
  • The test report is included as a certificate in duplicate with every H14 filter
  • The original test certificate can be filed in the documents - and the copy can be attached to the air purifier if necessary
  • HEPA high-performance filters H14 are tested according to EN 1822 and EN 60335-2-69.

Also suitable for every TAC air purifier with H13 filter

If you are already using a TAC air purifier, you can also install a H14 HEPA filter in it. The H14 filters are available as accessories for the professional air cleaners TAC 3000 , TAC 5000 or TAC 6500, for example . Simply replace the H13 filter in the particle filter compartment with an H14-HEPA filter.

Our recommendation for virus filtering

Zone air purifiers TAC V + or TES 200

The vertical construction of the mobile high-frequency air cleaners TAC V + and TES 200 enables a particularly effective establishment of "clean zone areas" - areas with virus-filtered ambient air. By installing several devices at appropriate intervals, clean air lock areas can be set up as low-aerosol dining, service or lounge zones.

High-frequency air purification eliminates aerosol clouds in minutes

The targeted installation of several high-frequency air cleaners of the type TAC V + or TES 200 can protect customers and staff from such occurring droplet and aerosol clouds. The air exchange rate is filtered out in the shortest possible time and the areas are permanently flushed with large amounts of virus-free room air, which significantly reduces the risk of infection in the “clean zone area”.

H14 special filter with thermal self-regeneration function

This clean air performance is made possible by a synchronous system consisting of efficient pre-filtering and final particle filtering using the integrated Heat resistant H14-HEPA filter. This special filter used in the TAC V + and TES 200 is heated cyclically, which inactivates all viruses separated in the filter and thus 100% “decontaminates” the filter again. This thermal self-regeneration function of the H14 special filter in the TAC V + and TES 200 are based on the same assembly, which is why both have the same blower output and HEPA air purification function. 

In addition to HEPA air purification, the TES 200 can also be used for combined room heating and for thermal decontamination of rooms and surfaces as well as for thermal pest control thanks to an additional built-in, powerful electric heating module and extended programming for various air treatment scenarios.

Thanks to their unique combination of filter and decontamination technology, the TAC V + and TES 200 reliably reduce an airborne infection risk in all areas with high public traffic.

With a TAC V + or TES 200 , the room air can not only be cleaned virus-free, but can also be odour-filtered at the same time.

Smells can sometimes linger. Whether smell of food, beer and alcohol, sweat or maybe nicotine can remain in a room, in the air bind or the carpets, wallpapers etc. if the air is not cleaned.

The high filter efficiency of the H14-HEPA air purification enables not only virus filtering but also odour elimination by filtering the odour-bearing suspended matter and thus creates all-round clean room air!

You decide which security level is best suited to your requirements:

The higher the air exchange rate the lower the better. The more fresh air in a room the lower the chance of viruses in the room air and the associated risk of infection. The level of the air exchange rate also determines the range of action of each individual high-frequency air cleaner. The air exchange rate should therefore be set to the maximum tolerable level. For non-binding orientation, 5 air changes per hour can be defined as a minimum measure to achieve a protective effect and 10 ac already represent a solid basic protection. If you want significant risk protection, for example in fully occupied rooms, then air exchange rates in a range of 15 to 25 EV should be ensured, because the primary goal is to prevent breathing airflow as much as possible. 

For purchase or for rent: Citycool can supply the right air purifiers

Regardless of whether you want to rent a high-frequency air purifier at short notice or want to buy it for long-term use - the devices and suitable filters are ready to go. 



Commercial air cleaners of the TAC series can separate corona viruses from the room air with high-performance filters

In order to effectively reduce the risk of infection with Covid-19 or other viruses, it is primarily effective to reduce the virus content in the air to a minimum, optimally to zero. Particularly in work environments and critical areas with an increased number of people, minimized exposure is mandatory in order to prevent spread and contagion chains from occurring in the first place.

Prevention through technical indoor air cleaning

The current state of knowledge is that Sars-CoV-2 is primarily transmitted via the respiratory tract - droplet transmission - or through physical contact, which is why health authorities unanimously advise to keep a sufficient distance. However, science is very intensely concerned with the question of how exactly the new corona virus 2019-nCoV is transmitted and whether direct transmission through the air instead of human-to-human transmission may also be possible.

A recent study by the well-respected trade journal "New England Journal of Medicine" (NEJM) came to the worrying conclusion that the transmission of the Sars-CoV-2 virus by aerosol, that is, in the form of suspended particles.

The scientists demonstrated that the virus can survive as suspended particles in the air for three hours. Expert Paul Hunter from the University of East Anglia in the UK said that "airborne transmission of the virus cannot currently be completely ruled out."

Renowned US immunologist Anthony Fauci recently commented on NBC that "you can't completely brush aside the idea that the virus is capable of traveling a certain distance in the air." Low air humidity and low temperatures in the room additionally increase the survival times of the viruses in the air.

Professional TAC air purifiers with H14-HEPA high-performance filters enable effective corona virus filtering

Virus strains such as the dreaded SARS-CoV, MERS-CoV or the now emerging novel coronavirus SARS-CoV-2 are of similar sizes. Current research specifies the particle size of a single corona virus to be 0.12 to 0.16 micrometers (120 to 160 nanometers), although the virus is usually released by coughing or sneezing as a so-called 'aerosol', which consists of a mixture of solid and liquid Floating particles, gases and water vapor exist and are significantly larger. For comparison: 1 nanometer corresponds to a millionth of a millimetre.

For this reason, special high-performance filters of class H14 are now available as consumption accessories for virus filtering for all professional air cleaners of the TOT model series from Citycool.

These final filters for clean rooms of classes ISO 4 and ISO 3 have a degree of separation of 99.995% with a particle size of 0.1 to 0.2 µm (100 to 200 nanometers).  

Due to their effective degree of separation, high-performance filters of the H14 class are used.

Effective filtering with a degree of transmission ≤ 0.005%

A degree of separation of 99.995% means that out of 100.000 suspended particles in a H14 filter 99.995 are retained by the filter, only 5 particles pass through the filter. This means that H14 filters have a tenfold higher separation than H13 HEPA filters.



Citycool high-frequency air cleaners keep the room air in waiting and treatment rooms germ-free

Anyone who goes to the family doctor or dentist must usually share the waiting room with sniffing, coughing or even feverish people. Many infectious diseases like influenza, gastrointestinal inflammation and also Covid-19 are transmitted via droplet and smear infections. Even the best and regular spray and wipe disinfection will not help if the pathogens literally fly in the air.

Waiting rooms and treatment rooms require special attention

It is therefore essential, especially in general practices with full waiting rooms and increased risk of infection, in addition to disinfecting the treatment instruments, the various surfaces and treatment rooms, to keep the room and breathing air as clean as possible and free of suspended matter and disease-causing microorganisms. To protect your own employees, but also to protect mostly elderly patients who represent a special risk group due to their weakened immune system.

Clean air is the be-all and end-all of a successful treatment

Viruses and bacteria that cause illness are persistent and survive for a certain time in the air. Studies have shown that the Sars-CoV-2 virus, for example, survive in the air for several hours and also retains its infectious effect during this time. And with each new patient in the waiting room, the invisible risk of infection for the other waiting people in the room increases.



The professional high-frequency air purifiers from Citycool neutralise virulent aerosol clouds in the air in large areas

Open-plan offices, museums, public institutions and authorities share a common problem: In areas with a high volume of visitors, there is always the risk that disease-causing suspended matter, allergens, spores, bacteria and viruses spread through the indoor air. .

It is not without reason that many people, particularly in times of rampant flu waves and other disease-causing epidemics caused by the norovirus or SARS-CoV-2 (coronavirus), reduce their time in closed rooms or buildings in which many people meet in a confined space. An important building block for an effective hygiene concept to protect against aerogenic infections is keeping the room air free of viruses through effective air cleaning with professional solutions such as the high-frequency air purifiers from Citycool.

Even in “normal” times, open-plan offices, authorities or public institutions sometimes have an above-average level of pollution in the air, as documented in various studies.

Even this pollution from fine dust, microfibers and mold spores can pose a risk to the health of the people present. And in times of a rampant epidemic, the risk of airborne infection from airborne viruses increases.

Scientific studies have shown that, for example, the Sars-CoV-2 virus can survive as suspended particles in the air for several hours and can retain its infectious effects. Other pathogens such as the noro or the influenza virus can also cover large distances when carried by air. And the more people there are in a room at the same time, the greater the risk that germs, viruses and bacteria that cause illness will spread throughout the entire lounge area through the exchange of air.


In open-plan offices, the coronavirus can spread at an alarming rate, as the US health agency CDC sums up in a recent study:

A recent incident from the South Korean capital Seoul shows how quickly the corona virus can spread through the air in the workplace.

In an open-plan office with almost 100 workplaces, a single employee who tested positive for the SARS-CoV-2 virus infected more than 90 other colleagues and residents - without having any direct personal contact.

Floor plan of the open-plan office concerned. Blue colouring indicates the seats of people with confirmed cases. Source: Centres for Disease Control and Prevention (CDC, https://www.cdc.gov/)

According to the CDC report:

Despite the quick reaction of the employer, almost 90 employees became infected before the first case was discovered. The following day, the competent authority then ordered the entire high-rise building to be closed, with a total of more than 900 employees and 200 residents, in order to interrupt the infection chains. However, it was already too late.  94 colleagues in the open-plan office and 3 residents of the multi-storey high-rise had already been infected with the corona virus.

NB It can almost be ruled out that the person who initially tested positive had direct personal contact with all other approximately 100 infected people (colleagues and house residents). Rather, it can be assumed that coughed-up aerosols or those contaminated with viruses when speaking have spread with the room air in the open-plan office or in the elevator and that these have been inhaled by the other employees or residents. It is worth mentioning in this context that there is currently no mask requirement in offices that at least reduce the droplet and aerosol clouds.




Filter virulent aerosol clouds reliably from the room air - the professional high-frequency air purifiers from Citycool create clean air for breathing and training

Operators of fitness studios, practicing physiotherapists and physiotherapists know the problem well enough: The air we breathe is polluted by suspended matter, such as dusts, nitrogen oxides etc but also by invisible pathogens such as viruses and bacteria, which colonize the respiratory tract or the pharynx and multiply there. 


Citycool air purifier with H14-HEPA filter: effective on bacteria and virus conglomerates

H14-HEPA filters from Trotec separate particles larger than 0.1 µm and are particularly recommended for filtering

  • Bacteria (0.6 - 1.0 µm)
  • Fine dust (0.1 - 10 µm)
  • Pollen (10 - 100 µm)
  • Virus conglomerates (0.4 - 0.5 µm)

Known virus strains such as the SARS-CoV, the MERS-CoV or the Covid-19 have a particle size of 0.005 µm to 0.1 µm. Usually combined with other particles, such as saliva, suspended matter, etc., they form conglomerates with a size between 0.4 µm and 0.5 µm. These conglomerates are also known as germs and are reliably separated from the Trotec H14 air purification filters.



Air performance    
  Air volume flow max. [m³ / h] 500
Ozone output    
  Max. [mg / h] 10,000
Electrical values    
  Mains connection 230 V / 50 Hz

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recommended protection [A]


Electrical connection    


CEE 7/7


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Length (without packaging) [mm]


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Regeneration mode


Oxygen regeneration mode






Operating hours counter




The TES 200 as a mobile solution for thermal virus inactivation, HEPA room air filtering and thermal decontamination of surfaces

Powerful thermal disinfector for mobile virus inactivation in rooms and on objects

Thermal disinfectors have long been proven tools in the field of cleaning and decontamination. With their help, medical devices are disinfected in the sterilization process or HVAC systems in hygienically sensitive areas are kept germ-free.

During the SARS pandemic, the WHO was already able to report that heat at 56 ° C is a noxious measure for SARS and kills the SARS coronavirus at around 10,000 units per 15 minutes. And the Robert Koch Institute (RKI) also recommends in the course of the Covid-19 pandemic on "hygiene measures in the context of the treatment and care of patients with an infection by SARS-CoV-2" in cleaning and disinfection operations that " thermal Disinfection procedures should preferably be used whenever possible ”.

Transportable mobile unit for decontamination of rooms and inventory

Previously available thermal disinfectors are primarily installed stationary. The vertical heater TES 200, on the other hand, is the first mobile solution for professional thermal room decontamination with integrated H14-HEPA air filtering on the market!

Instead of permanent installation in only one room, this special heating device "made in Germany" and can be used alternately to treat different rooms. Once the decontamination operation has been completed, the TES 200 can be easily transported to the next treatment site.



  • Mobile thermal disinfector for flexible and efficient inactivation of microorganisms
  • in the air and on surfaces
  • Target surface temperatures adjustable up to 65 ° C (70 ° C on request)
  • Also effective with SARS corona, influenza, hepatitis viruses
  • 360 ° inactivation, therefore no "white spots", as they occur in manual cleaning
  • with disinfectant chemicals in practice
  • Omnidirectional air distribution for uniform heating of surfaces
  • such as walls, cupboards, beds, tables, chairs etc.
  • Variably controllable exposure time of the target surface temperature
  • DualDecon function: alternating use as a thermal disinfector and between the
  • decontamination intervals as a professional HEPA-H14 air purifier for virus filtering
  • 4-in-1 function: Can also be used for thermostatically controlled room heating with professional air cleaning and virus filtering
  • 100% environmentally friendly, no chemicals, no harmful substances, hardly any personnel costs
  • Rooms can be used again immediately after decontamination
  • 100% odourless and free from allergenic substances
  • Professional quality "Made in Germany" - Original Trotec production


High performance H14 HEPA air purification ✓
Thermal decontamination respirators / PPE items ✓
Thermal decontamination rooms and objects ✓
18/27kw automatic space heating, tent heating ✓
Thermal pest control ✓

H14 Filtering Capacities:

Maximum exhaust air volume without filter in m³ / h:  2,500
Blow-out air volume in m³ / h with HEPA-H14 filter: 1,800
Clean zone area in m³ at 5 air changes / hour: 360
Clean zone area in m³ at 10 air changes / hour: 180
Clean zone area in m³ at 15 air changes / hour: 120
Clean zone area in m³ at 20 air changes / hour: 90
Clean zone area in m³ at 25 air changes / hour: 72


Thermal filter decontamination H14-HEPA Heat Resistant ✓
Use-related filter change indicator ✓
Intelligent automatic control, 4 automatic programs ✓
Manual / semi-automatic control X
Flowmatic control for constant clean air volume flow X 
Vario shift function for clean room applications X
Blow-out temperature variably adjustable up to 95 ° C ✓
Target room / surface temperature adjustable up to max. 70 ° C ✓
Treatment cycle adjustable ✓
Connectable "Plug & Play" to existing HVAC (optional) ✓
Can be connected to "Plug & Play" on flexible hose systems (optional) ✓
Sound level at nominal load dB (A) at a distance of 1m: 57
Connection voltage V / A 3 x 380-480, 50/60 Hz + PE / 32
Weight 84KG