r/crboxes

CR boxes are DIY (or buy) air purifiers that are much more efficient, affordable, and quiet than standard air purifiers. Show off your CR boxes, share tips on building them, and help reduce the transmission of Airborne diseases to end the ongoing Covid/SARS2 Pandemic. CR boxes stands for: Corsi-Rosenthal boxes CADR stands for: Clean Air Delivery Rate CFM stands for: Cubic Feet per Minute. Also referred to as airflow, the CFM is how much air a fan moves. Learn more at https://itsairborne.com