Homemade air purifiers can filter air faster, making them an affordable alternative to more expensive commercial products.

They also provide tips for making an efficient DIY air filtration unit. Here are the instructions: If you need a visual, here are two videos that may help. How to build a box fan HEPA filter ...

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

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 ...

A new low-cost DIY box filter is "highly effective" in clearing ... and air conditioning (HVAC); a cardboard base; and a box fan to draw air through the filters and toward the ceiling.

A new low-cost DIY box filter is "highly effective" in clearing the air of hazardous indoor pollutants ... The CR Box is made up of four air filters commonly used in heating, ventilation, and air ...