Patent ID: 7234690

Claim:
A humidifier comprising: a housing defining an air channel and a water reservoir, said water reservoir having a select water level height to contain a select maximum water volume; a water tank having an outer wall and an inner wall spaced from said outer wall to define a water holding area adapted to contain a select maximum volume of water, said water tank being positioned at least partially within said housing reservoir and being adapted to supply water to said water reservoir, said water tank inner wall defining an interior air channel in fluid communication with said housing air channel; and a motorized fan positioned to create an airflow through said housing air channel and said interior air channel; said water reservoir and said water tank having a maximum equilibrium water level therebetween, said maximum equilibrium water level being below said water reservoir select water level height, whereby should the water within the water tank overflow into the water reservoir the overflowing water is fully contained within the water reservoir when an equilibrium state is reached between the water reservoir and the water tank.