And Two, it’s more sensitive to filter existence than Various other purifiers: We’ve measured pretty significant fall-offs when testing 12 months-aged filters. Blueair recommends changing the filter “each six months or so,” and it’s best to follow that routine. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท Two Coway filters that we procured in February 2021 had waiting for link from Social Network Posts (32)