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 ...

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.

Social media users are sharing a surprisingly effective way to protect yourself indoors from the toxic wildfire smoke: a box fan, four air filters and a whole lot of duct tape.

The Reviewed lab team quickly made a DIY air purifier using a box fan, air filter, and duct tape. We tested the results with a formaldehyde detector.

How to do it yourself There are two types of DIY air purifiers: the filter plus fan and the box fan filter. Both of these require one or more HEPA or high-quality filters.

For your DIY purifier to work, it’s important to pay close attention to the directions because an air leak or a filter facing the wrong way will reduce the effectiveness of the system.

Smoke is expected to linger in the Bay Area until Friday at the earliest. Here’s what you need to know before you take the box fan and air filter approach.

Corsi-Rosenthal Cubes are DIY air purifiers that feature four Merv-12 air filters fastened with duct tape to the sides of a standard box fan.

Designed during the COVID-19 pandemic, a DIY air purifier known as a Corsi-Rosenthal box is becoming popular for its efficacy and inexpensive cost.

This DIY Air Purifier Can Actually Help When Wildfire Smoke Spreads We tested this popular social-media hack in the lab. Here's what you need to know before trying it at home.

Wildfire-accustomed residents on the West Coast are showing East Coast residents how to build Corsi-Rosenthal air purifiers as Canada’s wildfire smoke blankets the region.