Side by side
AirFanta 3 Pro vs Corsi-Rosenthal box
AirFanta 3 Pro
58 positive (89%) · 6 mixed (9%) · 1 negative (2%)
Trust + time weighted: +88%
Top excerpts
If you don’t mind the looks multiple air Fanta 3 pros. The will move a lot of air for the same db of noise compared to normal units.
I’d suggest air Fanta 3 pro if noise to cfm is any concern.
Multiple air Fanta 3 pros. There’s likely not going to be one single unit even if it was large that can cover a whole house as the air needs to be circulated
An AC Infinity or Air Fanta 3 Pro with carbon filters only things in that price range, for VOCs.
Air Fanta 3 pro. It may also be worth looking into cat food that reduces their allergens like purina liveclear etc.
Corsi-Rosenthal box
82 positive (82%) · 14 mixed (14%) · 4 negative (4%)
Trust + time weighted: +79%
AI summary — not a quote
The Corsi-Rosenthal box is a highly effective, DIY air purifier made from a box fan and MERV 13 or 14 furnace filters. It is widely praised on Reddit for providing a Clean Air Delivery Rate (CADR) that rivals or exceeds expensive commercial units at a fraction of the cost. While it is a favorite for budget-conscious users and those dealing with smoke or heavy dust, it is frequently criticized for its industrial appearance and high noise levels when using standard box fans.
Pros
- High Clean Air Delivery Rate (CADR) for large particulates and smoke
- Significantly more affordable than high-end commercial HEPA purifiers
- Highly effective for visible dust capture
- Customizable designs, including quieter versions using PC fans
Cons
- Large, bulky footprint that takes up significant floor space
- Standard box fan versions are often too loud for quiet environments
- Homemade aesthetic may not suit living areas or shared spaces
Top excerpts
I learned of a Corsi Rosenthal box (using MERV 14 filters) and decided to build one, but in my haste, I flipped the fan to be blowing air into the center of the box instead of upwards and let it run all night. My best guess is that the incorrectly built Corsi Rosenthal box ended up agitating the particles in our room and we inhaled some while sleeping.
Another good choice is building a CR box. The high setting will definitely be too loud, but this site found a decibel reading of 49 on the low setting
Levoit Vital 200s or Corsi Rosenthal Box
you get an Air purifier called a CR Box/Corsi Rosenthal Box...that does a whopping 440 CFM of air cleaning power. Better than any sub 400 dollar purifier, and better than some 1,000 dollar purifiers...for 90 bucks.
a CR Box/Corsi Rosenthal Box a great way to get cheap particulate coverage. (A CR Box only 90 bucks..and 440CFM power...so will be like 4x more powerful than that Coway...for same price.