What is the purpose of the drain line on a humidifier with a flat chamber?

The drain line on a humidifier with a flat chamber serves to remove excess water and prevent overflow. It helps maintain optimal humidity levels by allowing any condensate or unneeded water to escape, ensuring efficient operation. Additionally, it prevents the growth of mold and bacteria by keeping the water supply fresh and reducing stagnation. Overall, the drain line contributes to the humidifier's effectiveness and longevity.