OPTIMUM PERFORMANCE — Deep-pitched blades pull large volumes of dry air through dual evaporative humidifier filters, then circulate clean, cool-mist humidity throughout the room using Vornado’s signature Vortex Action for complete, even whole-room humidification in spaces up to 1,000 sq. ft. LARGE CAPACITY — A 4-gallon evaporative humidifier capacity delivers up to 4 gallons of moisture output per day on high, providing long runtimes, fewer refills, and consistent humidity for large rooms and open living spaces. SIMPLE CONTROLS — Intuitive control dials allow you to select fan speed (Low / Medium / High) and set your ideal indoor humidity level with the built-in humidistat, offering precise, customizable comfort. LOW MAINTENANCE — Dual spill-proof, leak-free water tanks are removable, easy to refill, and simple to clean, making routine maintenance fast and hassle-free. INTELLIGENT HUMIDIFICATION — Evap40 automatically senses humidity levels and circulation needs, adjusting output to maintain balanced, comfortable moisture for healthier air. Made in the USA of U.S. and imported parts. SUPERIOR SUPPORT — Our standards are high, and so are your expectations. If our product doesn’t meet them, we’ll replace it, for up to 5 years. Products designed and supported in Andover, KS. Built to meet U.S. voltage requirements. Certified, safety-tested, and warrantied for use only in the U.S.