CleanAirKits - Brisk Box (CleanAirKits)

For under $100, you can build a Corsi Rosenthal box or other DIY air purifier that is just as effective as some commercial products that cost at least $1000.

I've got a corsi Rosenthal box, a levoit, a Honeywell, and one other than I can't remember the brand of right now. The CR box has a high CADR but is noisy. Works great for clearing the air or when I have guests over. The levoit is quietest and I use that in my bedroom. Makes nice background noise. The Honeywell is fine. Picked it up 2nd hand from a thrift store for $10. I use to just help keep dust and pet dander out of the air.

This is what I use. I have a couple set up, one on the main floor and one near my pet (guinea pig) cages. Does a great job. Yeah it's ugly, but the only cost is the fan and the filters themselves, and it really works.

Great post! I would also add cleanairkits.com for the quiet, high CADR air filters.   I would also potentially add a caution around the far-uv (I own the Nukit and am happy with them) that I believe you should avoid prolonged use in a room that has little ventilation.  I'm intrigued by the smaller AirFanta laminar fan :)

Good call on the corsi-rosenthal box. I have a Honeywell. Though it can run insanely quiet compared to my CR box. I ended up hacking the PCB of the Honeywell to add automation via an ESP32. The CR box runs in the basement so it's just on a smart outlet. Also nice building it with aluminum. I did mine out of furring strips and cabinet screws. Lol.