Regular ventilation is one of the most effective measures against the spread of coronavirus, but cool outdoor temperatures and humid climates reduce the willingness to let cold air into rooms on a regular basis. An alternative can be devices that filter the room air.
However, the Robert Koch Institute warns against foregoing other protective measures when using room air cleaners. For example, the distance rule of 1.50 metres must still be observed or a respiratory protection mask must be worn. The problem: Highly effective filters alone can only remove aerosols, i.e. the finest droplets, from the air. That is why professional air purifiers additionally work with other measures to render viruses harmless, in the case of our VirstopAir air purifier with activated oxygen and low-temperature plasma, both solutions that are suitable for destroying the structures of viruses.
Room air purifiers must be adapted to the size of a room, i.e. the air volume, in order to purify the air in a reasonable time. For example, a room with 20 square metres of floor space and a room height of 2.5 metres contains about 50 cubic metres (m³) of air. The capacity of the filter units is given in m³ per hour (h).
It is generally recommended to filter the air in a room six times per hour. This means that a unit for the 20-square-metre room mentioned would have to have a capacity of at least 300 m³/h. A single air change does not mean that all viruses are filtered out of the air.
The filter performance always refers to ideal, theoretical conditions. In practice, the decisive factors are how the air is distributed in the room and how the units are positioned so that contaminated air is drawn in.
Only so-called HEPA filters (High Efficiency Particulate Air Filters) of classes H13 and H14 can effectively stop particles of the size that occur in aerosols with coronavation. The filters must comply with the European Standard EN 1822-1:2009. Another criterion is the noise level of the filter devices.
MEDIACC GmbH (Berlin) confirms the VirstopAir room air purifier in an expert opinion on machine performance and efficiency with a filtration of 99.99998% of all particles from 0.3 µm and the inactivation of all viruses, bacteria, germs, spores, etc.
The VirstopAir room air purifier has been assessed by the BGN (Berufsgenossenschaft Nahrungsmittel und Gastgewerbe) for machine safety during use. There is no danger whatsoever from emissions of ozone or nitrogen oxides.
In the test report according to EN 1822-4:2009 Annex A you will find all important information about the characteristics of a HEPA H14 filter.
The VirstopAir models CA 813, CA 814, CA 1113 and CA 1114 meet the requirements of the KRINKO guidelines and are therefore even suitable for use with immunocompromised patients.
The VirstopAir room air purifier is available in the following versions: