The Philips AC3256/10 removes bacteria, dust, and odors such as cigarette smoke from the air in your home. This reduces complaints such as coughing and a stuffy nose. Smart sensors adjust the ventilation speed in automatic mode to the detected air quality. Do you want to manually adjust the power of the airflow? Choose 1 of the 5 settings. If you use the air purifier in your bedroom at night, it doesn't keep you awake, thanks to silent mode. Colored lights indicate the current air quality, so you can see at a glance how clean the air is in your home, without having to look at the display. The air purifier is suitable for rooms from 31 to 95m².Note: the filters have to be replaced when they're saturated.