2021
Yes
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8123370/
Park, Sowoo
Asia
Modeling
Elementary (K-5)
Ventilation rates
Temperature
Coronavirus disease 2019 (COVID-19)
Airborne transmission
Natural ventilation
Air change rate (ACH/AER)
Infection probability
Classrooms
Under cross-ventilation conditions, the average ventilation rates were measured at 6.51 h−1 for 15% window opening, and
11.20 h−1for 30% window opening. For single-sided ventilation, the ventilation rates were reduced to about30% of the values from the cross-ventilation cases. The infection probability is less than 1% in all cases when a
mask is worn and more than 15% of the windows are open with cross-ventilation. With single-sided ventilation, if the exposure time is less than 1 h, the infection probability can be kept less than 1% with a mask. However, the infection probability exceeds 1% in all cases where exposure time is greater than 2 h, regardless of whether or not
a mask is worn. Also, when the air conditioner was operated with a window opening ratio of 15%, power consumption increased by 10.2%.
11.20 h−1for 30% window opening. For single-sided ventilation, the ventilation rates were reduced to about30% of the values from the cross-ventilation cases. The infection probability is less than 1% in all cases when a
mask is worn and more than 15% of the windows are open with cross-ventilation. With single-sided ventilation, if the exposure time is less than 1 h, the infection probability can be kept less than 1% with a mask. However, the infection probability exceeds 1% in all cases where exposure time is greater than 2 h, regardless of whether or not
a mask is worn. Also, when the air conditioner was operated with a window opening ratio of 15%, power consumption increased by 10.2%.