The article completely ignores noise. I personally have a box fan filter, but I don't pretend that it's appropriate or better for most people-- it's loud and annoying to work in the same room, and almost impossible to sleep with. And it is important that they're constantly on [0] (air quality generally reverts to normal levels in less than 2 hours), because all homes breathe to mitigate moisture and mold growth.

[0]: https://smartairfilters.com/en/blog/can-you-turn-off-your-pu...