People spend a lot of time indoors, especially in the winter months. It is therefore important to filter dust, dirt, and other particles from the indoor air by means of an air‐conditioning or ventilation system adapted to the conditions. Especially in the course of the corona pandemic, air filtration plays an especially important role. Appropriate high‐efficiency particulate air filters (HEPA‐filters) can effectively remove viruses such as corona viruses from the air. This reduces the risk of infection with SARS‐CoV‐2, which can cause COVID‐19 disease. With HEPA filters of filter classes H13 and H14 from EMW® you ensure good indoor air quality and offer the people in the rooms better protection against the coronavirus.
Room air cleaners with a HEPA filter that also filters out viruses or bacteria are usually used primarily in areas where special hygiene regulations apply. These include hospitals and other health care facilities, as well as the food industry or research and development facilities. In the course of the corona pandemic, however, it has become clear that such air filters also offer great advantages in other areas. To filter coronaviruses from indoor air, HEPA filters can be used in all public and commercial areas where it can be assumed that people infected with SARS‐CoV‐2 are occasionally present. These include :
To effectively filter viruses such as the coronavirus from the air, a filter of class H13 or H14 is required. These HEPA filters remove more than 99.95% or 99.995% of the particles from the room air. This makes them much more efficient than, for example, F7‐F9 filters, which are inadequate against viruses. Although large droplets, which are released by talking, coughing, or sneezing, for example, can sometimes be filtered out of the air, more powerful air filters of the HEPA filter classes are necessary for the much smaller aerosols. Especially smaller aerosols containing viruses can remain active in the air for a long time without the appropriate filter and thus pose a risk of infection .
The efficiency of HEPA filters also varies greatly: H14 filters have a higher separation rate than H13 filters. Depending on the requirements for filtering the room air , it is therefore necessary to opt for the more efficient HEPA H14 filters against viruses.
HEPA filters consist of exceptionally fine fibre media. These are made of glass fibres with a diameter
of a few micrometres. The high filter performance results from the fact that the fibres are arranged
randomly in a very fine structure. In order to make the filter surface as large as possible, the filter
media are installed in a pleat‐like structure.
To ensure that the HEPA filter functions permanently and constantly, a fine dust filter should be used
as a pre‐filter, for example an F7 filter. Viruses are then separated by the HEPA filter, while the pre‐
filter has already removed larger particles from the air in advance. This is because different filtration effects come into play depending on the size of the aerosols to be separated. This prevents the more
efficient HEPA filter from being clogged by larger particles and thus having to be replaced again after
a short period of use.
To ensure good indoor air quality and at the same time filter viruses ‐ for example, the coronavirus that causes COVID‐19 ‐ an air conditioning or ventilation system with HEPA filters is ideal. Even the smallest particles can be effectively separated from the air. Let us advise you now about our HEPA filters against viruses: Our team will be happy to answer any questions you may have!