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and rust down to 20 microns (20 μm) and should be replaced every 6 months
Additionally
Adding the high-efficiency activated carbon filter from MANN+HUMMEL further reduces unpleasant odors and harmful gases such as smoke
A subtle dot-matrix display
Product number: 105913
Prefilter for Blue 211 & 3610 Arctic Trail (Dark Grey) and rust down to 20At Blueair, we go to any length to increase cleaning efficiency even if it means putting spandex on our air purifiers. The fabric pre filter catches larger particles, extending the life of the main filter. Just vacuum it or put it in your washing machine when it needs cleaning. Works With: Pure 221 Product number: 106243
