What is the difference between a humidifier and the Puritii Air Purification System?

The Puritii APS is not a humidifier. Humidifiers raise the humidity level in a home or building by adding water vapor or droplets to the air. Overuse of humidifiers has been shown to increase mold growth and dust mites. The Puritii APS does not add or remove water from the air, but rather eliminates up to 99.99% of contaminants including small particles, chemicals, mold, and bacteria.