Just like that, the Corsi-Rosenthal box was born. A Corsi-Rosenthal box is a do-it-yourself air purifier made with 4 MERV 13 air filters and a box fan. Photo Credit: Festucarubra / Wikipedia ...

During a wildfire, residual smoke distributes on the breeze, infiltrating homes, schools and offices. To help people protect themselves and their families, researchers have developed a low-cost, ...

The fan draws air through the sides of the cube and out the top. The units are simple, durable and easy to make, and are more effective than simply placing a single filter in front of a box fan.