The Shark NeverChange Air Purifier delivers all-day clean air with powerful, long-lasting HEPA filtration. Watch your air quality improve in real time and breathe easier as Shark's PureShield Anti-Allergen* filtration captures dust, pet dander, smoke, irritants, and more. Plus, with up to 5 years of long-lasting filtration,** you can save big on pricey filter replacements.*Allergen refers to non-living matter. ** vs. cost of replacing filters over a 5-year period on top 10 leading competitor units under $150. Source: Based on market share data as of Nov. ‘23 to Oct ‘24.