cleans rooms up to 1,882 sq ft in 1 hour (941 sq ft in 30 minutes, 627 sq ft in 20 minutes, 470 sq ft in 15 minutes) Captures 99.99%* of airborne allergens including pollen, dust, smoke, and pet dander, as small as 0.01 microns Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life The first line of defense against the largest airborne particles found indoors Visual indicator displays real-time air quality in the room with LED lights Built-in air quality sensor measures and adjusts fan speed in real-time Control and monitor your air purifier remotely with the Winix Smart App Nearly silent on slowest speed (23.5dB) Unit automatically activates its quiet, energy-efficient Sleep Mode when room is darkened and returns to Auto Mode in the presence of light This unit is proven dependable and efficient by being AHAM Verified, and UL Certified