The best air purifiers for allergens, smoke, and odors

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We tested more than 40 models to find the best air purifiers that were the most effective at clearing odors, smoke, and other air pollutants.

Camryn Rabideau;Heidi Borst/Business Insider

The best air purifiers work their magic in the background of your life. You want to set them up, forget about them, and let them enhance your indoor air quality. We've come to view them as a household essential...