Essick Gallon Console Style Evaporative Air Whole House Humidifier of Unit Capacity 5.5 gallons in Oak Burl (447 400HB) New Digital Humidistat Automatically Maintains Your Desired Humidity Level Digital Readout Displays Actual Humidity Level, Desired Humidity Level or Fan Speed Automatically Shuts Off When Desired Humidity Level is Reached or When Unit is Empty Refill Indicator Shows When Bottles Needs Refilling Easy-Roll Casters for Portability From Room to Room as Needed