The Wildfire Smoke Fact Sheet: Indoor Air Filtration resource discusses effective air filtration options for reducing indoor air pollution during wildfire smoke events. This fact sheet provides information on the basics of filter efficiency and the difference between central air systems and portable air cleaners. It offers guidance on selecting high-efficiency filters and discusses the different types of portable air cleaners to help you determine the best fit for your home.

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AirNow is a partnership of the U.S. Environmental Protection Agency (EPA), National Oceanic and Atmospheric Administration (NOAA), National Park Service, NASA, U.S. Centers for Disease Control and Prevention (CDC), and tribal, state, and local air quality agencies.