NPR News·3 min read·easy
Is smoke in your home? Here's how to make an air purifier using a box fan
B
Bill Chappell
✦AI Summary
As wildfire smoke impacts air quality across the U.S., experts are providing guidance on building DIY air purifiers using box fans and high-efficiency filters. These measures are intended to help reduce exposure to harmful particulate matter like PM 2.5.
A version of this story was originally published on Jan. 10, 2025. It has been updated to reflect the wildfires currently bringing smoke to the U.S.
healthenvironmentclimate
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