Air filter selection chart
ULPA AS1324 test dusts approximate micron sizes No. I ( methylene blue) - mass median diameter of .65 microns No.4 5% Cotton fibres 23% Mollocco Black 0.8 micron 72% Air Cleaner fibres 39% 0 to 5 micron 18% 5 to 10 micron 16% 10 to 20 micron 18% 20 to 40 micron 9% 40 to 80 micron Sizes of particles
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