No: But they may help remove allergen particles from the air that may trigger the hypersensitivity reaction that is the basis of asthma.
Answered 3/28/2017
5.7k views
Filters / purifiers: Air filters capture particles; some purifiers treat the air chemically. How the air changes depends on which you use. In order for a filter to have a significant effect on an allergy, it needs to filter the volume of air in the room at least 10 times per hour and be highly efficient, e.g. 99.74%. They help most for pet dander: light particles that stay airborne much longer than dust mite particles.
Answered 9/28/2016
5.7k views
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