Air Innovations Cool Mist Top-Fill Humidifier for Large Rooms &ndash; MH-901 Teal Up to 600 sq. ft. Freshen your space with pure, clean moisture with the Air Innovations 1.6 Gallon Cool Mist Humidifier Antimicrobial protection helps prevent microbial growth in the Water Tank. Permanent ceramic filter  It never needs replaced Designed to operate quietly for uninterrupted sleep. Auto Safety Shut Off Removes impurities and puts clean, pure moisture back into the air. For rooms up to 600 sq. ft. 1-year limited manufacturer's warranty.