[jefftk]

> Folks should really just buy a regular air filtration unit that uses much less electricity and is quieter

This post is about how one of these made with a ceiling fan can be much quieter than a regular air filtration unit: "Testing my prototype, it has a CADR of ~180 CFM and is only 33dB. By contrast, the Wirecutter's top-recommended air purifier has a CADR of 233 CFM at 54 dB or 110 CFM at 36 dB. With some tweaks it should be able to match the commercial purifier's performance, without being louder."

> especially if it auto-adjusts speed depending upon need

I see how that works for wildfire smoke, but how would it work for covid?

[mistrial9]

virus in the air is dependent on effective filtration, rather than bulky particulate matter by volume.. the virus is highly contagious (few particles matter a lot)