alt Hacker Newsa box fan and a furnace filter.
Replies
poszlem • today at 3:47 PM
To people who think this is a joke, it isn't: https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box
a box fan and a furnace filter.
To people who think this is a joke, it isn't: https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box
It works really well and even more - it works better than any purifier even if you just duct-tape the filter you have to a box fan.