![Do the DIY box fan filters work? Well, here's mine after just 1.5 days running in a closed bedroom (Greenwood area) : r/SeattleWA Do the DIY box fan filters work? Well, here's mine after just 1.5 days running in a closed bedroom (Greenwood area) : r/SeattleWA](https://external-preview.redd.it/qRq0rLpWi0MZNjIkG6MWxhiSIanAhvhkDhOIWNEjtgc.jpg?auto=webp&s=41b67e0952bfb02032db18bc4f328962e82d6d5b)
Do the DIY box fan filters work? Well, here's mine after just 1.5 days running in a closed bedroom (Greenwood area) : r/SeattleWA
![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)
How to make a box fan filter to clean indoor air of smoke | Interdisciplinary Center for Exposures, Diseases, Genomics and Environment
![Efficient Box Fan Air Cleaner: a Universal Corsi-Rosenthal Box : 16 Steps (with Pictures) - Instructables Efficient Box Fan Air Cleaner: a Universal Corsi-Rosenthal Box : 16 Steps (with Pictures) - Instructables](https://content.instructables.com/F1I/414B/KW23YY00/F1I414BKW23YY00.jpg?auto=webp&frame=1&width=320&md=bd507c23b4b1ca0e506ddbea2592da18)
Efficient Box Fan Air Cleaner: a Universal Corsi-Rosenthal Box : 16 Steps (with Pictures) - Instructables
![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)