CleanAirKits - Brisk Box (CleanAirKits)

I got a basic brisk box 6 months ago using 3M 1900 filters on it. Placed it in the room with cat litter boxes and it made a huge impact on the amount of dust. Other units I tried have struggled to keep up. Highly recommend clean air kits.

Corsi Rosenthal boxes have good CADR. They're DIY box fan air purifiers. Plenty of YouTube tutorials if you ever wanted to try your hand at it.

If the room is only 100 SQ ft, one air should be enough. Depending on your budget, Clean Air Kits has quiet air purifiers. Their Brisk Box would work well. They're pretty pricy though. Another option is the Levoit Vital 200s. It's rated for a larger room (390 SQ ft) but you could run it at a lower and quieter speed and get good air cleaning.[Vital 200s Review](https://housefresh.com/levoit-vital-200s-review/) Right now my daily mask is the BNX boat style N95. For a while I was wearing Kleenguard duckbill N95. I can reuse the BNX masks but generally I don't after an 8 hour day. I'm starting to reuse my masks a bit more- wearing them twice before tossing. Most of my work day is in my office solo with the air purifiers running. Today I was in a fairly crowded room wearing my mask for the second time. I tossed the mask once home. Probably would have been better to wear a fresh mask to an event I knew would have a lot of people. I didn't have any extra masks on hand. I had a box of extra masks at work but recently ran out.

This right here. I have one of these in my apartment and am planning on getting a second one. Easy to replace fans, easy to replace filters, it's just best option.

Make your own "brisk box" from CleanAirKits. I do 12x12x1 boxes and I think I've gotten the price of the fan lid to about $80 DIY. 2 of those would be better than half the HEPAs in your budget. More so than just a filter, you should have a doffing process. E.g. Figure out your air volume, CADR (clean air delivery rate) and then you will have an ACH (air changes per hour). This lets you make informed decisions about how much filtration you buy and how safe that filtration makes you feel. I aim for 10-12 ACH and the recommendation I see most often is 12.

Check out cleanairkits.com. Their luggables look sharp and fit the criteria.  But they have slightly louder fans than their Bris box design the bros box isn’t as attractive. No other manufacturer will move the same amount of air at the decibel of these units.  But there is no speed setting, they’re just quiet. Every other purifier will clean less air or be louder and you’ll have to turn down the fan speed.

You need a couple corsi rosenthal boxes. Each one will run you about $90 in today's prices. They perform as well as a $1000 air purifier for 1/11th the price. r/CRBoxes can help. [https://youtu.be/hIuH-2naozI?si=xNUdt\_djOjXdJKja](https://youtu.be/hIuH-2naozI?si=xNUdt_djOjXdJKja)

Unfortunately that website has been completely taken over by affiliate link BS. 95% of air purifiers sold online are complete garbage. Have tried many over the last 15 years due to asthma and allergies. The only cost effective solution I found that actually works (have an air things air quality monitor so I can tell by turning on and off air purifiers) is a box using home furnace fan filters. I got one from clean air kits that uses computer fans and it's super quiet so you can sleep with it on. Mine is 4x 20*25" filters. You can make your own with box fans but they will be crazy loud. The 4 fan one is good for a small room. https://www.cleanairkits.com/?ref=ANNALE&gad_source=1&gad_campaignid=22709004639&gbraid=0AAAAA_ODbriF_jyz8Gjm983QOPyONyoIt&gclid=CjwKCAjwt-_FBhBzEiwA7QEqyI5KZ5R9_7eGZZIs3i8JuZzTyN3fsBU8lDCdZe9VxwvN-gMl4hPouhoCCpMQAvD_BwE And you don't need the most expensive filters either, in fact they work better with the mid range ratings as they have way more airflow. Mine are 10s or 11s I think...

If you look at cost, CADR/CFM, and noise, nothing on the market beats [Clean Air Kits](https://www.cleanairkits.com/?ref=CCCircle), period. Data to back it up, any entry in gray is a setting that is louder than 50db: [https://docs.google.com/spreadsheets/d/1kQMWNyKfkB0K8A4\_yXMrSAb-CruVl9lASJEpLGLtS8o/edit?usp=sharing](https://docs.google.com/spreadsheets/d/1kQMWNyKfkB0K8A4_yXMrSAb-CruVl9lASJEpLGLtS8o/edit?usp=sharing)

Not pretty but very effective  Corsi–Rosenthal Box - Wikipedia https://share.google/VT90TcVB763kaVmSa

They work very well. When covid hit i looked for a way to try and address aerosol transmission as someone who has never caught a light cold or had a touch of the flu in my life. If i get sick i get very sick. I put together 2 of these and bought a CO2 and a particulate air monitor and i was amazed at how dirty those filters would get in just a matter of months. After a while i bought filters that use PC fans because they are much, much quieter. I was lazy and bought them but if you are a little bit handy you can put them together yourself. [https://www.youtube.com/watch?v=wS0LK\_LiqmE](https://www.youtube.com/watch?v=wS0LK_LiqmE) The ones i bought come from here if you have the funds: [https://www.cleanairkits.com/](https://www.cleanairkits.com/)

I'm using the CR boxes, and I'm very happy with them, especially since it cost me less than $200 to make three huge ones, and I assume the filters will last years.

You can make a Corsi Rosenthal air filter. Check out the instructions on youtube. They work as well as industrial air filters.