Filter towers are filter units that freely draw in hall air, filter it and release it back into the hall. Authorities assess filter towers very differently. Thus, filter towers are not classified by the authorities as a ventilation measure. Since they freely draw in the hall air, they are also not an air filtration system. Therefore, for regulatory purposes, filter towers do not constitute a permissible protective measure. However, it may very well be accepted by the competent authority in individual cases in the course of an individual assessment.
Do you have questions about the effect of individual protective measures? We are happy to assist you.