Study 1: "Can mobile room air cleaners effectively reduce the risk of an indirect SARS-CoV-2 infection caused by aerosols?"

The TAC V + mobile air purifier was specially developed for virus filtering and has been tested for its effectiveness in several scientific studies. A study conducted by Prof. Dr. Christian Kähler at the Institute for Fluid Mechanics and Aerodynamics of the University of the German Federal Armed Forces in Munich has confirmed that with the TAC V+ the aerosol viral load and therefore an airborne risk of infection in interior spaces can even be substantially reduced with the windows closed and without a suitable interior ventilation system.

"The quantitative measurement results show that, with the TROTEC TAC V+ room air cleaner tested, due to the large volume flow and the filter combination of class F7 + H14, aerosol concentrations even in rooms with a surface of 80 m² can be reduced by half within 6 – 15 minutes, depending on the volume flow. In the case of rooms with 20 m² the concentration is halved within approx. 3—5 minutes depending on the volumetric flow.

Therefore, room air cleaners of the TAC V+ type make it possible to easily maintain the aerosol concentration in small-sized to medium-sized rooms at a low level. ... Air purification units of the TAC V+ type are therefore perfectly suited, for instance, to provide for a constantly low virus load in classrooms, shops, waiting or treatment rooms, without having to think about opening windows and affecting the well-being in the room. Furthermore, in contrast to free ventilation by means of windows they also ensure a true reduction of the virus load, something that free ventilation can often not guarantee.

In addition and compared to room ventilation systems working without or only with a small proportion of fresh air , they also offer the benefit of ensuring that the viruses are actually filtered out and that they are not spread within the building through other channels. ... "To ensure that the room air cleaner always remains hygienically safe even in continuous operation over many months, the H14 filter should be heated to approx. 100 °C for about 30 minutes every day, in order to destroy the viruses in the filter and prevent the formation of biofilms, bacteria and fungi without the use of any harmful chemical additives or UV-C radiation."

In an interview with the news magazine "Spiegel", Prof. Dr. Kähler summarizes his research results with regard to the TAC V+ as follows: »If you let this system run permanently, no one will manage to generate an aerosol concentration of an infectious level in any room!«

The TAC V+ from Trotec is the only mobile air purification unit provided with a special H14 high-temperature lamellae particulate air filter with thermal decontamination, a process in which the EN 1822-certified H14 filter is treated thermally at regular intervals and is heated to approx. 100 °C, a procedure which practically destroys all viruses filtered out and which, by scientific expertise, is therefore defined as absolutely indispensable to effectively purify the air from viruses! Only the combination of an effective F7-H14 filter system, a perfectly balanced air volume flow and the exclusive thermal filter decontamination technology provides for an effective protection against infections!