The important thing metric to think about is CADR, or clear air supply charge, a sign of how rapidly a air purifier can clear a quantity of air, taking into consideration air circulate and filter effectivity. For instance, a air purifier with a CADR of 200 cfm (cubic ft per minute) can clear 12,000 cubic ft per hour. For a 500-square-foot room with eight-foot ceilings (4,000 cubic ft), that interprets to a few full room air exchanges per hour. In line with Sorensen, the Environmental Safety Company recommends 5 exchanges per hour, however this goal can change relying on whether or not the room in query is a bed room, an auditorium or a classroom.
https://www.washingtonpost.com/life-style/wellness/air-purifier-smoke-covid-best/2021/08/29/28ea4176-0740-11ec-a266-7c7fe02fa374_story.html?utm_source=rss&utm_medium=referral&utm_campaign=wp_lifestyle | Selecting an air air purifier to guard from smoke, covid