Existence of a Nonzero Worst-Case ACH for Short-Term Exposure in Ventilated Indoor Spaces

Figure 2

(a, b) Normalized quanta obtained from LES as a function of ACH for separations of , , , and for overlap times of and 15 min, respectively. The peaks (marked by a circle for room 1 and a cross for room 2) clearly highlight the worst value of ACH to be avoided. (c) Plots of as a function of for three different values of and for two different values of large sick-to-susceptible separation. All cases contain a yellow band to depict the realistic range of ACH values for a typical classroom or office space.

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