And Two, it’s a lot more sensitive to filter existence than some other purifiers: We’ve measured reasonably significant fall-offs when screening year-previous filters. Blueair endorses replacing the filter “each and every 6 months or so,” and it’s best to keep on with that schedule. ฝุ่นละออง, เชื้อรา, ละอองเกสร และแบคทีเรีย Along with waiting for link from Social Network Posts (3)