DUAL STAGE FILTRATION — Our advanced air purifier features two True HEPA Filters that capture 99.7% of airborne pollutants as small as 0.3 microns, including smoke and pet dander. Combined with dual Activated Carbon Filters. EFFICIENT COVERAGE — The Vornado AC550 is designed to efficiently cover small to medium-sized rooms up to 180 square feet. Ideal for bedrooms, offices, or kitchens, this room purifier can improve your sleep quality and supports heart and lung health. EASY OPERATION WITH 4 SPEEDS — Experience effortless control with four-speed electronic settings. Select a higher speed for rapid air purification or choose lower speeds for quieter operation, allowing you to customize the air cleaner’s performance. SLEEP MODE — The AC550 features smart sleep mode that uses a light sensor to automatically reduce noise levels in low light conditions. This function makes it an excellent purifier for bedroom, ensuring a tranquil environment for a restful night’s sleep. ADVANCED SENSORS — Dust-sensing technology monitors the air quality and adjusts output automatically. The filter replacement indicator lights let you know when your filters need replaced. Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.