And two, it’s a lot more sensitive to filter lifetime than some other purifiers: We’ve measured rather considerable drop-offs when testing calendar year-aged filters. Blueair suggests replacing the filter “just about every 6 months or so,” and it’s best to keep on with that program. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท The Core three hundred https://www.mannature.com