The fresh air purification industry is an industry dedicated to improving and ensuring indoor air quality. It achieves two core functions of ventilation (introducing fresh air and discharging polluted air) and purification (removing pollutants from the air) through technological means, creating a healthy, comfortable, and safe indoor breathing environment for people. It is mainly used in industrial fields that require immaculate environments, such as pharmaceuticals, biotechnology, electronics, semiconductors, aviation, hospitals, and other industries.

In fresh air purification equipment, the core function of the fan is to overcome resistance and drive air flow. It must push air through resistant filters and deliver clean air to the desired space through long air ducts.