Induction fans operate by utilizing the high-speed directional airflow emitted from multiple induction fan nozzles, properly designed and arranged within the system. This airflow draws in fresh or treated outdoor air, delivering it to the required area without the need for ductwork, thus organizing indoor air flow and achieving effective and economical ventilation and air exchange. Commonly used in public facilities, such as garage ventilation systems, they mix and clear local air dead spots, improving the air quality. They primarily save space. A windless induction ventilation subsystem composed of multiple induction fans can be integrated with supply and exhaust fans to form the entire ventilation and smoke extraction system.