Forced ventilation fan:

Working Principle: A forced ventilation fan is a mechanical device driven by an external power source (e.g., an electric motor) to force air out or into a specific area.

Characteristics: Forced ventilation fans are able to quickly and efficiently change the flow of air in a space, and are often used to quickly remove harmful gases, fumes, or odors, as well as to provide fresh air.

Applications: Commonly used in ventilation systems in industrial, commercial and residential buildings to ensure air quality and environmental comfort.

Induced Ventilation Fans:

Working Principle: Induced ventilation fans utilize the principle of surrounding air flow to direct and enhance ventilation through natural wind or airflow power.

Characteristics: Induced ventilation fan does not need external power source, relying on natural wind or airflow to promote air circulation, low energy consumption.

Application: Commonly used in the ventilation design of buildings to utilize airflow power around the building to enhance ventilation and improve indoor air quality.

Overall, forced ventilation fans and induced ventilation fans differ in their ventilation principles, working methods and application areas, and the choice of the right ventilation equipment depends on the specific use scenarios and needs.