... gallon capacity for 18-24 hour operation Water Vaporizer/Warm Mist Humidifier 1. Easy to fill, clean and maintain.2. ... hour operation 3. Pure, sanitized warm mist, relieves cold & flu symptoms. Product Name: Water Vaporizer/Warm Mist Humidifier Features:1. Easy to fill ... 18-24 hours operation. 3. Pure, sanitized warm mist, producing comfortable warm mist into air, makes better breathing every day. 4 ...