And Two, it’s more sensitive to filter lifetime than some other purifiers: We’ve measured reasonably major fall-offs when testing year-previous filters. Blueair suggests changing the filter “every single 6 months or so,” and it’s best to follow that agenda. ตัวเครื่องอาจค่อนข้างใหญ่ไปสำหรับผู้ใช้บางท่าน The lack of oversight is a concern — that you Successfully Submitted (Awaiting Approval)