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. 2021 Dec 9;11(12):125114. doi: 10.1063/5.0064805

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FIG. 13. — Particle concentration of different air purifier positions and particle source positions at an ACH of 5. (a)–(d) Air purifier position SW-N with the aerosol source positions 1, 29, 63, and 80. (e)–(h) Air purifier position SW-W. (i)–(l) Air purifier position NE-N.