Air filters are great during wildfire smoke events, but they don’t do much to improve indoor air quality afterward, a study found.
Even after smoke from a wildfire has visibly cleared, lingering toxins indoors can tank air quality and threaten our health. Harmful chemicals stick around on surfaces and release into the air—and, new research found, air filters won’t get rid of them. In a study published this month in Science Advances, scientists documented how smoke leaves behind chemicals known as volatile organic compounds, or VOCs, that remain on surfaces inside a home.
“We did quite a few experiments looking at air cleaners, and they are very effective for particles in the air,” she told Earther. “But we found they are not very effective for any of the volatile organic compounds for any of those gasses.” The researchers opened windows and doors to ventilate the home they were experimenting in, but they found that the VOC levels increased again as soon as they stopped ventilating. The only permanent solution was cleaning.
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