Humidifier with Ionizer CA-604W - Suitable 55m² - Ultrasonic Humidifier has the following specifications Especially during the heating period, relative humidity in living and working spaces drops below the advised 50-55% level. In summer times relative humidity in apartments, offices and buildings is often too low because of air-conditioning. Suitable for small and larger spaces up to approx. 590ft² (55m² / 140m³). Ultrasonic air humidification A small plate vibrating at high frequency (ultrasonic membrane) in the lower part of the air humidifier provides micro-fine cold mist with ultrasonic water diffuser technology and humidifies indoor air. A gentle airstream generated by a fan spreads the mist inside the room. Air purification through ionization In addition to of air humidification, an integrated ionizer produces negative oxygen ions that clean and refresh indoor air. Negative ions cling themselves to dust particles, microorganisms and other unwanted particles in the air and c...