Research Article

Elevator Ventilation and SARS-CoV-2-Relevant Particulate Matter Removal in Three Older California Elevators

Table 3

for the three elevators. All rates except are based on the use of NaCl.

Rate constantExperimental descriptionElevator 1 (1940s) (hr-1)Elevator 2 (1960s) (hr-1)Elevator 3 (1980s) (hr-1)Mean elevator air change (hr-1)

NormalNatural ventilation stationary elevator+closed door based on CO2 decay
Total particle removal in stationary elevator+closed door
Particle removal rate in moving elevator

InterventionIntervention: stationary elevator+air cleaner
Intervention: moving elevator+air cleaner
Intervention: stationary elevator+open door