IDEAL PURIFIER FOR PERSONAL USE Large coverage of up to 36 m380 sqft, it purifies a standard room in just 12 minutes with a CADR of 250 mh Standard room size is 18 ft by 12 ft with an 8 ft ceiling height 2-LAYER HEPA FILTRATION Captures 99.97 of particles up to 0.003 microns PM0.003 to protect from pollen, dust, pet dander, smog and viruses. The Philips NanoProtect HEPA filter can clean up to 2x more air than traditional HEPA H13 filtration 360 PROTECTION Scans the air 1000x per second and intelligently chooses the right speed while displaying real time AQI on the air quality monitor. Morevoer, its 360 air suction ensures that no pollutant is left behind QUIET AND EFFICIENT. In sleep mode, it runs at only 20.5 dB. Energy-efficient, it uses up to 21W to purify the air, less than a traditional light bulb, making it the ideal air purifer for bedroom COMPACT PORTABLE DESIGN The AC0920 air purifier comes with a display panel on top , 360 suction on the bottom and an air outlet on the top to ensure effective pure air circulation and ease of operation, making it the ideal personal air purifier 2 years brand warranty