Which is why [Adam Kelly] decided to design this DIY HEPA air purifier ... “lid” which would position the fan so it draws air through the center of the filter. In terms of testing, [Adam ...

Corsi hoped to reach as many people as possible who couldn't put down hundreds of dollars for a commercial HEPA air filter. The DIY solution ... and a box fan to draw air through the filters ...

Known as the Corsi-Rosenthal Box, the cost-effective air filter was originally created to ... The materials for the box are simple: a 20-inch box fan for the top, four common household filters ...

At its core, an air purifier is just a fan that blows air through a filter. In fact, if you’re truly in a pinch, taping five HVAC filters to a box fan (to create what’s known as a “Corsi ...

Corsi hoped to reach as many people as possible who couldn’t put down hundreds of dollars for a commercial HEPA air filter. The DIY solution ... and air conditioning (HVAC); a cardboard base; and a ...

Known as the Corsi-Rosenthal Box, the cost-effective air filter was originally created to filter particles containing infectious viruses in indoor spaces.