Evaporative humidifiers are a great solution for adding much needed humidity to dry indoor air. By raising indoor relative humidity levels to 43% or above, 86% of airborne flu virus particles are rendered powerless. This espresso evaporative humidifier from AIRCARE is sure to complement any decor. It has an easy-fill tank design. This humidifier works to add invisible moisture to your environment by moving dry air through a saturated wick filter.