QuietCareTM HCM-6012i provides natural relief from dry indoor air. The Protec Pure Moisture System provides a 4 step process for fresher moisture. The Airwashing filter helps capture dirt dust and pollen the Protec Cleaning Cartridge helps reduce mineral build-up the Protec Extended Life Filter helps prevent the growth of mold and odor causing bacteria on your filter while the ionizer helps freshen the air.