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並前往http://www.bccdc.ca/resource-gallery/Documents/Guidelines%20and%20Forms/Guidelines%20and%20Manuals/Health-Environment/WFSG_EvidenceReview_FiltrationinInstitutions_FINAL_v3_edstrs.pdf

Filtration in institutional settings during wildfire smoke events

recommends that a filter with a rating of MERV 17 be used. • According to the technical literature, the loading rate of air filters is ...

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