And Two, it’s far more sensitive to filter daily life than A few other purifiers: We’ve measured reasonably significant fall-offs when testing 12 months-outdated filters. Blueair recommends replacing the filter “each individual six months or so,” and it’s best to stay with that plan. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท To help aid the investigation, waiting for link from Social Network Posts (7)