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. 2020 Dec 31;105:103576. doi: 10.1016/j.jdent.2020.103576

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Fig. 6 — Correlations between room ventilation rates (ACH_vent) and the relative effectiveness of portable air cleaner measured by time differentials between ACH_total and ACH_vent in reaching 95 % or 100 % aerosol removals. The higher the ACH_vent, the lower the benefit gained from the addition of a portable air cleaner in the overall effectiveness of aerosol removal.