Device to create negative room pressure

Ornella Mangiacasale indicated 13.03.2020
Ernesto Arriola 17.05.2020

Hello Ornella. There is a device to clean the air of the room. The device produce Ozon and should be very effective agains virus and bateria and much more . There some restrictions to use the device according EU - Normative/2008/50/EG I found an article (in german) who describe a scientif evaluation of the ozon devices.