PowerPure 1000 Humidifier Humidifies up to 250 Square Feet; Features a 1-Year Manufacturer Warranty Ultra-Quiet Operation; Emits up to 1.61 Gallons Per Day Reservoir Holds .92 Gallons of Water for All Day Operation No Expensive Filters! Features a Permanent Ceramic Filter that Softens and Keeps Water in Reservoir Fresh Bottom Fill Design; Light, Easy to Carry Water Tank with Built-In Carrying Handle