note that phrase like "600ft³ of clean air" are misleading. filtration drops off rapidly with distance from the air purifier, so the fan would need to be quite oversized for a room to experience relatively even filtration. for most rooms, that wouldn't be comfortable, for both noise and draft reasons.
i'm down with air purifiers for indoor particulate matter (i.e., air pollution), but they're not really going to make a dent in covid transmission rates. transmission happens mainly during long face-to-face conversations, which mostly precedes/bypasses room air filtration.
it’s the appearance of doing something that’s more valuable to bureaucrats than solving real, underlying problems and providing genuine leadership (like quelling anxiety and fears rather than stoking them).
(central) air filtration can be effective against harmful pollutants, but not really against infectious agents like corona.
i'm down with air purifiers for indoor particulate matter (i.e., air pollution), but they're not really going to make a dent in covid transmission rates. transmission happens mainly during long face-to-face conversations, which mostly precedes/bypasses room air filtration.