Abstract
The spread of the SARS Cov2 virus in Europe clearly reveals the need of new ventilation concepts. Schools are considered to be one of the main origins of the spread. Therefore, ways to reduce the possibility of indirect infection in everyday school life are investigated. In this paper, the results of field studies are presented. In the course of these studies, different modes of action (filtration, UV-C, photo-catalysis) and room flow concepts (mixed ventilation, displacement ventilation) were considered. The evaluations of the measurements show how the devices influence the sensations of the students (sound pressure level, draught risk, etc.). Furthermore, it shows how the exhaust air capture works and how the room flow is affected. Therefore, ways to reduce the possibility of indirect infection in everyday school life are sought here.
Highlights
While at the beginning of the pandemic spread of the SARS-CoV2 virus it was assumed that spread of the virus happens mainly by smear infections, in the course of 2020 it became evident that the most important transmission path was airborne particles
This article focusses on the engineering measures, which include the use of existing ventilation systems, window ventilation and the use of mobile air cleaning devices
Recirculating air cleaners reliably remove pathogens from the room air when the air volume flow is sufficiently high. They are equivalent to ventilation systems or window ventilation
Summary
While at the beginning of the pandemic spread of the SARS-CoV2 virus it was assumed that spread of the virus happens mainly by smear infections, in the course of 2020 it became evident that the most important transmission path was airborne particles. In the course of this realization, considerations arose as to how the transmission paths can be prevented by different measures. This article focusses on the engineering measures, which include the use of existing ventilation systems, window ventilation and the use of mobile air cleaning devices. The use of mobile air cleaning devices is seen as an alternative or supplement to window ventilation. These devices can be installed and at moderate costs. ILK Dresden has carried out tests in several schools at different locations to observe the performance of the mobile air purifiers installed in the classrooms.
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