The Corsi-Rosenthal box is an inexpensive air filter you can easily make yourself using a box fan. Learn how they work and get instructions for how to make one.

This DIY box fan filter is a fairly cost-effective way to clean the air in your home. We purchased a box fan from a hardware store for about $20 and each one of the four air filters separately was ...

Box fan turned into air filter for Ithaca High School classroom. Teacher Hallie Snowman is hoping to make 50 for all rooms to help reduce the spread of COVID-19 (photo: Hallie Snowman).

Converting a box fan to a cheap, effective air purifier is easier than you might think. Here's what you will need, how to do it, and what mistakes to avoid.

Just one day before classes began, UCSD students and staff helped make their classrooms safer against COVID-19 by building DIY air filters out of boxes and fans.

As much of the northern and eastern US finds itself enveloped in haze stemming from Canadian wildfires, Engadget has a timely how-to for building your own box air fan.

The story of the Corsi-Rosenthal box—an easy-to-make and effective portable air filter—is an example of the grassroots response to the COVID-19 pandemic.

A large area of greater Los Angeles had unhealthy air Friday, due to particulate matter from large wildfires. Here are tips for breathing cleaner air indoors if it's smoky outside.

You can find a do-it-yourself tutorial here on how to make your own air cleaner with just a box fan and furnace filter. Make sure the box fan is newer than 2011 because of fire hazards with older ...

Option 2 Another design, known as Corsi-Rosenthal Box, does not have the air filter directly placed on the fan, but incorporates multiple filters and a cardboard bottom to create a cube.

Window box fans A good box fan can make all the difference in a small space, especially if you have a window to put it in to help filter fresh air inside. Box fans for windows come in a number of v… ...

And my partner and I set out to build a Cocoon for ourselves. This is Ali (ph) and Alex's (ph) attempt to make a box fan filter. Gall sent me a PDF with instructions.