Experimental evaluation of the airborne infection probability in ventilated office room at different supply airflow rates

The impact of the supplied airflow rate on distribution and exposure exhaled airborne pathogens in a room with mixing ventilation was studied. Experiments were conducted field laboratory at three supply rates: 20, 40, 60 L/s. Two breathing thermal manikins used to resemble infected susceptible occupants. Nitrous oxide (N 2 O) dosed into air by manikin simulate emission infectious aerosols. N O concentration measured inhaled manikin. data calculate infection probability modified Wells-Riley model. highest 4.3-5.1%, obtained case 20 L/s, decreased increasing rate. decrease slowed increase flow. calculated based tracer gas exposed all studied cases higher than occupied zone exhaust. up 65% method, which assumes complete mixing.