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Thursday, October 7, 2021

DIY box fan air filters – Corsi-Rosenthal box

Also known as a Corsi-Rosenthal box, this DIY method of building your own air filter with MERV13 furnace filters and a box fan are an easy and cost-effective way to help clear indoor air from airborne virus particles, wildfire smoke, pollen, dust, and more!

If you can seal a box, you can build one (or 100!) of these! 

Video: How to effectively ventilate classrooms using fans, HEPA filters or Corsi-Rosenthal box fans and monitors

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