A new low-cost DIY box filter ... The CR Box is made up of four air filters commonly used in heating, ventilation, and air conditioning (HVAC); a cardboard base; and a box fan to draw air through ...

To help people protect themselves and their families, researchers have developed a low-cost, durable, do-it-yourself (DIY ... and a box fan to draw air through the filters and toward the ceiling.

The DIY solution, called the Corsi-Rosenthal (CR) Box, was codesigned with filtration specialist Jim Rosenthal. The CR Box comprises four air filters commonly used in heating, ventilation, and air ...