Catch your breath in the classroom

Nuremberg, June 2021

To minimise the risk of infection in classrooms and thus make teaching possible in the first place, various measures are implemented to reduce aerosol exposure.

Unfortunately, pure ventilation has proven to be less effective in practice, especially if one takes into account the associated disruptive factors, such as noise, fine dust or pollen drift from outside. If ventilation is possible at all. The situation is even more problematic in rooms where no windows can be opened.

Aim of the study

One of the most effective methods is considered to be the use of air purification devices. The IGR wants to find out in a broad field study how this technology can be used under real conditions.

  • Do handling and ongoing operation prove themselves in practice?
  • Can the lessons be held without disruption?
  • Is the operation and maintenance comprehensible and user-friendly?

Scientific background

According to experts, such as Dr. Sauter from the Institute for Aerosol Research, filter efficiency in particular is crucial for significantly reducing the risk of infection when it comes to significantly lowering the concentration of viruses, allergens and fine dust in the air.

With the aim of minimising the risk of infection in group rooms (and thus protecting pupils, teachers and school staff), this requirement must be met. I.e. a high filter efficiency of at least 99.995 % should be given by the high filtration efficiency of a high-performance filter, e.g. the HEPA high-performance filter H14 according to industrial standards. Our study partner, KRIEG Industriegeräte GmbH & Co. KG supports us with a test device that fulfils these technical requirements in order to accompany the study as an example.

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