> how these DIY compare to actual commercial products That's actually what this article discusses: "If you’re in a hurry, this post says that if you strap two

> how these DIY compare to actual commercial products That's actually what this article discusses: "If you’re in a hurry, this post says that if you strap two HEPA filters to a box fan, it will clear the air of basically all the particles we can measure, and it will do it faster than a commercial filter that costs twice as much."