The third wave of infections had just subsided when the fourth wave was already on the horizon. And in view of the experiences in Great Britain, this one will probably soon be history. There, the virus mutation called "Omikron" has triggered a new wave. This coming fifth wave, presumably caused by this new virus mutation, is supposed to show the biggest increase in infections.
By now, we have probably all grasped the fact that Corona will be with us for a long time to come. Therefore, we need protection concepts that allow us to live our daily lives as normally as possible.
The focus continues to be on schools in particular. This is where people meet. Keeping a distance is difficult. Viruses can spread. How can a school concept look like that allows us to be as normal as possible?
The requirement is actually formulated quite simply.
Viruses must not be allowed to spread in the room after they have been released, but must be removed directly
This is a task of ventilation technology. Acceptable, simple or also high-performance solutions are possible. What they all have in common is the ventilation concept of layered ventilation.
Many experts, even more opinions and likewise many ventilation solutions, some of which are questionable, overwhelm school owners, planners and operators.
In any case, a ventilation expert expertise can help to separate the wheat from the chaff.
Which ventilation concept is suitable to reduce the risk of infection in rooms with high occupancy?
The scientific discussion to be referred to here compares different airflow forms and their ability to reduce the risk of infection. In summary, all devices that do not prevent air mixing in the room or even promote it can be denied the ability to significantly reduce risks. Only stratified ventilation as a practicable ventilation solution for new buildings as well as for refurbishment considerably reduces infection risks.
New requirements for schools and places of assembly
The summer holidays are over, many pupils back in their homeland. School has just resumed. In Germany, as in many other countries, Covid19 case numbers are rising again. The influence of young age groups, mostly still of school age, is increasing. In this context, the question arises to what extent current and future classrooms and their ventilation systems will meet the new requirements?
Many questions inevitably arise about the future school operation mode. How will school operations be organised, especially in the cold seasons? Will the highly contagious mutations of infectious pathogens determine the infection events in school operations? Is there a possibility of school operation in classrooms without wearing a restrictive protective mask? The influence of young age groups, mostly still of school age, on the incidence of infection is increasing, as the following diagram shows.
The energy turnaround will force school operators to use ventilation technology in classrooms in the future for the purpose of saving energy, regardless of the pandemic requirements. In the future, the installation of HVAC systems will also be eligible for funding. What solutions does ventilation technology offer to return to a regulated and safe school operation? How can room ventilation systems be subjected to a quality inspection? Answers are provided in the handout "Air technology to reduce the risk of infection" and the associated publication. The research cooperation of Weiss Klimatechnik GmbH and Energy Systems Engineering - Dr Nobis has compared room flows in the room flow test and derived infection risks.