Air-borne contaminations increase by indoor human traffic or polluted air intakes from the door-window passages and room surroundings. The concentration of infectious and allergic particles will increase if the indoor air will not be filtered by real HEPA and UV-C air purifier. Purified air is needed to decrease contaminant concentration and prevent the spread of infectious particles inside the room. The actual airflow rate of HEPA air purifier will be a very critical parameter and important to prevent air contamination.
Optimal removal of contaminants depends mainly on actual CADR of the device and enough ACH for the indoor room volume. In addition to this principle, optimal air and particle sweeping performance must be obtained by applying advanced engineering methods to the design of the air-flow pattern.