And Two, it’s additional sensitive to filter everyday living than A few other purifiers: We’ve calculated pretty substantial fall-offs when tests calendar year-previous filters. Blueair endorses changing the filter “each and every six months or so,” and it’s best to persist with that agenda. จัดส่งฟรี! เมื่อสั่งซื้อเครื่องกรองอากาศทุกรุ่น Along with a HEPA Successfully Submitted (Awaiting Approval)