And Two, it’s much more sensitive to filter daily life than A few other purifiers: We’ve measured rather significant drop-offs when tests year-outdated filters. Blueair recommends replacing the filter “each and every 6 months or so,” and it’s best to stick to that timetable. ฝุ่นละออง, เชื้อรา, ละอองเกสร และแบคทีเรีย As outlined Successfully Submitted (Awaiting Approval)