And Two, it’s additional delicate to filter daily life than some other purifiers: We’ve measured pretty substantial fall-offs when screening yr-old filters. Blueair suggests changing the filter “each and every 6 months or so,” and it’s best to stick with that timetable. ฝุ่นละออง, เชื้อรา, ละอองเกสร และแบคทีเรีย It’s strong sufficient to Successfully Submitted (Awaiting Approval)