Air Innovations 1.7 Gal. Cool Mist Digital Humidifier For Large Rooms &ndash; Up To 600 sq. ft Permanent Ceramic Filter helps eliminate hard water deposits and other impurities. Antimicrobial Protection helps prevent microbial growth in the Tank & Base. Truly Programmable Timer allows you to set the unit to turn ON or OFF in 1-24 hour increments. 5 levels of Adjustable Mist output from Low to Turbo. The Air Innovations MH701B Humidifier is Recommended by Consumer Reports and was given a score of 90 out of 91 points.