An Evaluation of DIY Air Filtration

Household use of portable air cleaners has increased in the face of recent wildland fire activity and in response to COVID-19. Some local agencies have begun recommending Do-It-Yourself (DIY) air cleaners (i.e., furnace air filter attached to electric box fans) during smoke events as DIYs offer an affordable and accessible alternative to commercially available air cleaners, which frequently sell out during smoke events. However, there are concerns regarding the safety of DIY air cleaners as these consumer fans are not being used as intended by the manufacturers and have not been evaluated by safety certification processes.

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Last Modified: 07/01/2021 (17 pp., 12.7 MB)