... gallon capacity for 18-24 hour operation Water Vaporizer/Warm Mist Humidifier 1. Easy to fill, clean and maintain.2. 1.2 ... cold & flu symptoms. Product Name: Water Vaporizer/Warm Mist Humidifier Features:1. Easy to fill, clean and maintain; 2. 1. ... 18-24 hours operation. 3. Pure, sanitized warm mist, producing comfortable warm mist into air, makes better breathing every day. 4. Worry ...