Greenland 5.3Gal Commercial Humidifier for Large Rooms, WiFi Enabled[Less Refilling] Equipped with a 5. 2Gal 20L water tank, the GLH20 can produce 25 40 hours of mist on a full tank. The split design of the GLH20 allows you easily add water from the top and avoid any leakage from the bottom. [Clean And Cool] Before pumping the water and turning it into mist, the filtration stone in the pump helps remove impurities from the water. An added UV C light function eliminates harmful pollutants from the water to keep the