The only HEPA system available with built-in humidification, this 2-in-1 air cleaner and humidifier unit guarantees a healthy room climate throughout the year. The AOS 2071 not only ensures pure air by removing even the smallest particles, but also optimal humidity (evaporator system). This appliance efficiently reduces the levels of air pollutants such as pollen, dust, animal hair and mites creating a room climate in which allergy sufferers, in particular, can take a deep breath. The 2 HEPA filters (High-Efficiency Particulate Air Filter) and the active carbon filter capture 99.97% of particles larger than 0.3 microns, ensuring a dramatic reduction in a room's pollutant content.