Mold and Mildew Resistant Tank Silver Clean technology: The water tank has been treated with a fungistatic agent to protect it from fungal and mold growth * Maximum Comfort With Choice of Cool or Warm Humidification Select humidifying temperature based on need with your choice of warm or cool humidification** * No Added Costs No evaporating pads, filters or wicks to clean or replace * Large Capacity Water Tank Up to 120-hour run time on one tank fill* 2.0 gallon tank capacity * High-Output Nozzle Broadens mist in two directions throughout the room & the spray nozzle can be adjusted to three levels based on your needs