The Comfort Zone® line of Cool Mist Ultrasonic humidifiers combine modern styles and unique features for maximum impact. Our humidifiers feature 12-24 hours continuous whisper quiet operation. An excellent addition to your home environment category for consumer health and wellness. Perfect for cold weather locations, humidifiers add moisture to heated rooms and can aid in relieving the discomforts of nasal congestion, dry itchy skin, chapped lips and dry throat. Increase comfort level in all environments with added moisture in the air.