Corsi–Rosenthal Box

The Corsi–Rosenthal Box is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It consists of four[1] or five[2][3] HVAC particulate air filters that form a cube and a box fan to draw air through the filters. The seams of the cube are sealed with duct tape. A 2022 study found the clean air delivery rate on the five-filter design was between 600 and 850 cubic feet (17–24 m3) per minute (depending on fan speed), while costing roughly a tenth of commercial air filters. Engineers Richard Corsi and Jim Rosenthal created the five-filter design during the COVID-19 pandemic, with the goal of reducing the risk of infection by reducing the levels of airborne viral particles in indoor settings.

  1. ^ Sun, Lena H. (14 January 2023). "After three years of covering covid, I built my own air filter". Washington Post. ISSN 0190-8286. Retrieved 8 June 2023.
  2. ^ Cite error: The named reference rosenthal was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Dal Porto, Kunz, et al 2022 was invoked but never defined (see the help page).
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