2020 Yes https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)31488-0 Silva, Luis F.O. South America Observational Potential hazardous elements Carbonaceous matter dehumidifier Cooling load Indoor schools Health In short, the data of the investigational studies here shown are quite positive regarding the use of air conditioners to decrease the indoor exposure to airborne particle concentrations indoor. Potential hazardous elementsCarbonaceous matterDehumidifierCooling loadIndoor schoolsHealth