Philips 2-in-1 purifier cleans rooms up to 65 m² and quickly humidifies the air at a rate of 500 ml/h. With app control and sensors, it scans the air and automatically adjusts to humidify and clean the air of allergens and pollutants.The key performance indicator of a purifier is CADR (Clean Air Delivery Rate): the clean airflow generated in 1 hour. The higher CADR, the faster the cleaning. The dirtier the room, the higher the CADR must be. This purifier has a CADR of 250 m3/h and it can effectively purify a whole room of up to 65 m2 .3-layer filtration with NanoProtect HEPA, active carbon and pre-filter captures 99.97% of ultra-fine particles as small as 0.003 microns, so you are safe from PM2.5, bacteria , pollen, dust, pet dander, gas and other pollutants.