![Monkeybrains ISP on Twitter: "DIY air filter system. Box fan ($16), filter ($20), tape. Leave running 24x7! https://t.co/eGJphSGJ0C" / Twitter Monkeybrains ISP on Twitter: "DIY air filter system. Box fan ($16), filter ($20), tape. Leave running 24x7! https://t.co/eGJphSGJ0C" / Twitter](https://pbs.twimg.com/media/Drv-4VlVAAAnMWz.jpg:large)
Monkeybrains ISP on Twitter: "DIY air filter system. Box fan ($16), filter ($20), tape. Leave running 24x7! https://t.co/eGJphSGJ0C" / Twitter
![BOX FAN AIR FILTER For About $40! (How To Build a DIY Box Fan Air Purifier With HVAC Filters!) - YouTube BOX FAN AIR FILTER For About $40! (How To Build a DIY Box Fan Air Purifier With HVAC Filters!) - YouTube](https://i.ytimg.com/vi/4kBWKFhOFOM/sddefault.jpg)
BOX FAN AIR FILTER For About $40! (How To Build a DIY Box Fan Air Purifier With HVAC Filters!) - YouTube
![A DIY Air Filtration Solution to Help Fight COVID-19 (for under $50) | by Jim Rosenthal, CEO, Tex-Air Filters | Medium A DIY Air Filtration Solution to Help Fight COVID-19 (for under $50) | by Jim Rosenthal, CEO, Tex-Air Filters | Medium](https://miro.medium.com/v2/resize:fit:996/0*mu1ePmZDfyS5z_GD.jpg)
A DIY Air Filtration Solution to Help Fight COVID-19 (for under $50) | by Jim Rosenthal, CEO, Tex-Air Filters | Medium
![Social media and duct tape are helping people make DIY air purifiers that filter out wildfire smoke | AP News Social media and duct tape are helping people make DIY air purifiers that filter out wildfire smoke | AP News](https://dims.apnews.com/dims4/default/4c40e38/2147483647/strip/true/crop/3000x1688+0+1253/resize/1440x810!/quality/90/?url=https%3A%2F%2Fstorage.googleapis.com%2Fafs-prod%2Fmedia%2Fe65a9ffbefa64ee5ba3b80442cd9b6d8%2F3000.jpeg)
Social media and duct tape are helping people make DIY air purifiers that filter out wildfire smoke | AP News
![How to make a box fan filter to clean indoor air of smoke | Interdisciplinary Center for Exposures, Diseases, Genomics and Environment How to make a box fan filter to clean indoor air of smoke | Interdisciplinary Center for Exposures, Diseases, Genomics and Environment](https://deohs.washington.edu/edge/sites/deohs.washington.edu.edge/files/inline-images/AirFilterInfographic_FINAL.jpg)