CleanAirKits - Brisk Box

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.

I love my CR boxes but I get that they're not for everyone. I have a Bissell Air 400 for my bedroom specifically because it's oversized for the room (better efficiency) since I have bad tree pollen allergies. I've been very happy with it.

My wife built two of these for our house. She despises dust. They work pretty well.

One is in the front door foyer to blow up the stairs. The other is in the living room. We have a dog that sheds a lot and that's where he spends much of his day.

They work. Most are over priced though and the filters cost an arm and a leg and are where the profit is at. Most people could get away with a Corsi-Rosenthal Box, connected to a smart plug and turn it on when they cook for a drastic improvement in indoor air quality for cheap.

If you're looking to collect dust - you should make a Corsi-Rosenthal box. A HEPA isn't going to process enough air for really getting rid of dust. If you don't want to make one yourself, or want a nicer aesthetic, check out Clean Air Kit. Here's an [informative video](https://youtu.be/gaQTYrisieA?si=mjj8lAmHywe_exSu) on this topic.

Second the corsi rosenthal box. You'd need to pay 4x the price at least for comparable filtering

"Corsi-Rosenthal Box" is the way to go if you don't care about aesthetic. It's really effective for larger sq footage rooms

budget budget, build a corsi-rosenthal  otherwise, get a coway airmega. it's a little pricier than some but it has a carbon filter which is great for smells. prefilter catches a lot and saves wear and tear on the hepa panel

You can literally press a cheap furnace filter onto a running box fan to make one. It will suction itself on. Tape on the top of it if you want to move it around, check how dirty it is by hand or by flow. Technically 1 filter to 1 box fan reduces the flow, but it works. 4 filter intakes for 1 box fan is the practical/high efficiency setup people like which are called: Corsi-Rosenthal Box setups

Look up a Corsi-Rosenthal box. The modern world has a ton of cheap, reasonably high quality air filters built for furnaces in every hardware store. The cost of high end air filtration vs what a CR Box can do is pretty silly unless you're allergic or have money to burn. There are even designs and builds specifically to be more permanent than the intial construction method so you can spend 50-75 bucks on parts, then just swap filters and have something that works for like a decade.