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Initial Pressure Drop the lower the better, Initial Efficiency the higher the better, Filter Efficiency, Dust Holding Capacity...
HEPA are high efficiency standard filters that often used in healthcare facilities, food & pharmaceutical manufacturing because they are able to filter.....
Differences in Air Filter Standards ASHRAE 52.2 (MERV) vs ISO 16890 in classifying air filters: measuring the number of particles vs comparing the mass of particles after and before passing through..