Best Air Purifiers for Allergies 2026

HEPA air purifiers capture 99.97% of particles 0.3 microns and larger, including pollen, dust mites, pet dander, and mold spores. Room size rating and Clean Air Delivery Rate (CADR) are the most important specifications. Annual filter replacement costs of $30-$100 are the true ongoing expense, making filter-less or washable-filter models increasingly attractive.