Air contaminants in indoor environments can cause health and comfort concerns. High concentrations of CO, released by cooking with biomass fuels can kill in less than 5 min. 1 NO 2 , released by tobacco smoke, 2 contributes to the development of chronic bronchitis. 3 Bio-effluents are released by bioaerosol shedding from human skin, clothes and hair, 4,5 and create an odor. 6 Meanwhile, airborne transmission has been observed for various infectious diseases in indoor environments, such as measles, 7,8 chickenpox, 9 tuberculosis, 10 severe acute respiratory syndrome (SARS), 11 influenza A, 12 and coronavirus disease 2019 (COVID-19). 13,14 Indoors, airborne transmission between occupants arises from the transport of droplet nuclei containing infectious agents. 15 Such droplet nuclei can be produced by the evaporation of droplets 16 emitted by infected individuals through speaking, coughing, and sneezing. 17 Considering that people spend nearly 90% of their time indoors, 18 it is crucial to study the transport of contaminants in indoor environments.