And two, it’s more sensitive to filter lifetime than Various other purifiers: We’ve calculated reasonably significant fall-offs when testing year-previous filters. Blueair suggests changing the filter “each and every six months or so,” and it’s best to stick with that agenda. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท The dearth of oversight is a concern — https://www.mannature.com/products/detail/airpurifier