The Journal of Allergy and Clinical Immunology (JACI) found air purifiers were an effective tool in asthma management by reducing indoor allergens, and we consider the following to be the best air purifiers for asthma. How we chose the best air purifiers for asthmaWe conducted extensive research, reached out to two allergy experts, and engaged in first-hand testing to compile this list of the best air purifiers for asthma. The best air purifiers for asthma: Reviews & RecommendationsOne thing to note: We at Popular Science pride ourselves on recommending the best products at the best price. While a small air purifier or a cheap air purifier may be a good air purifier in certain circumstances, it is unlikely to work as well as a larger model with a higher CADR. Final thoughts on the best air purifiers for asthmaContaminants in your indoor air quality can cause asthma flare-ups.