Night Mode runs an 8-hour cycle designed to support your body's natural cooling process during sleep. It operates in three stages: the first hour runs at a higher speed for initial cooling, the next 3 hours gradually reduce speed as you enter deeper sleep, and the final 4 hours run at the lowest speed for gentle overnight comfort. Oscillation angles are automatically set for optimal airflow during rest. Once the 8-hour cycle has ended the fan will turn off.