Humidifier's patented top-fill technology allows easy filling from above with a pitcher or water can. Eliminates trips back and forth to the sink with a heavy tank that has to be flipped over onto its base. Flowing water provides relaxing, soothing sound. Quietly runs 48 hours on one filling while manual controls provide simple operation with two settings. Removable dishwasher safe top grille and filter tray allow easy cleaning, while ProTec treated filter and water reservoirs help keep humidifier clean between cleanings. Comes with three year limited warranty. Replacement filter: HAC-700PDQ. Recommended for medium to large (850 - 1400 sq. ft.) rooms.