Which is why [Adam Kelly] decided to design this DIY HEPA air purifier that can be built for less than $100. That might still sound like a lot of money, but compared to the $500 sticker price he ...

(But don’t limit yourself to only the models on our list of the best air purifiers; we also constructed a DIY air purifier out of materials and supplies you may already have around the house.

To learn more about DIY air purifiers visit the Gonzaga University Institute for Climate, Water, and the Environment's resource page on smoke and air quality preparedness. "There are lots of DIY ...