The role of air distribution against the spread of Covid 19


An interesting article concerning the importance of good air treatment to contain the spread of the SARS-CoV2 virus in closed environments recently appeared in major national italian newspapers based on a research by the Bambin Gesù Pediatric Hospital held together with Ergon Research and the Society of Environmental Medicine (SIMA). According to this study, air conditioning systems play a decisive role in controlling the dispersion of potentially contagious particles (droplets and aerosols) produced by breathing in closed environments since it has been documented that the doubling of the air conditioning flow inside a closed room reduces the concentration of contaminated particles by 99.6%. In fact, with the increase in ventilation, the aerial dispersion of droplets and aerosols is faster with a consequent lower concentration of contaminant at very low and substantially irrelevant percentages for the purpose of contagion.

Obviously, the exchange of air with VMC systems or with AHU with recuperator is an essential prerogative for all air conditioning systems, in fact we can cite another article published in El País, the most popular newspaper in Spain, where examples of situations have been reported at risk whose probability of contagion was calculated by a “Covid Airborne” software developed by a group of scientists led by Professor J.L. Jiménez of the University of Colorado.

Our ONEAIR DHI high induction micro-perforated ducts, textile, plastic and metal, fit into this framework as they have the mixing capacity up to 25 times compared to the air input (induction effect) therefore they perform an even more amplified reduction action of contaminating particles. Thanks to our CFD sizing software and in association with the above-mentioned systems, they represent a very effective technical solution to contain the spread of the SARS-CoV2 virus in closed environments.

Corriere della sera

El pais