We did not test a drop-base air filter assembly to verify this point. At the very end of our test, just for fun, we tried a small 9-inch-diameter air cleaner assembly equipped with a 2-inch-tall ...

Interest in air filters ... more about filter rating systems at member station LAist. A smaller and more affordable approach is to attach one MERV filter to the back of a box fan, an idea laid ...

As built here, a Corsi-Rosenthal Box can provide five full air changes inside ... then matching filter dimensions to those of the fan can help make assembly easy, but with enough duct tape and ...

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, called the Corsi-Rosenthal (CR) Box, was codesigned with ...