If your children tend to get colds, a warm mist humidifier would be good. These boil the water to create the water vapor. The steam is mixed with room air before it comes out so it is not too hot ...

The humidifier has a large tank that can hold more than 1.5 gallons of water. Since it also has a powerful fan, it can run for up to 60 hours on a single tank, providing continuous, even mist for ...