The AirDoctor AD5000/AD5500 4-in-1 Air Purifier is designed for extra large spaces, high ceilings, and open concepts. It features an UltraHEPA filter that captures particles 100 times smaller than the HEPA standard, along with a dual-action Carbon Gas Trap/VOC Filter to remove odors, ozone, and volatile organic compounds. The auto-mode adjusts filtration based on air quality, while the quiet performance and ionizer create a peaceful, fresh air environment. With a filter change alert, this air purifier ensures your indoor air stays clean and healthy.