Fire Extinguishing Exhaust Axial Fans are generally used for fire protection, used to exhaust smoke in the early stage of a fire, with high-temperature resistance, and are typically designed to operate normally for half an hour at a temperature of 280 degrees. Fire Axial Fans include both Exhaust Axial Fans and Supply Axial Fans (with symmetrical construction), one for exhaust and the other for supply. The Supply Axial Fan is known as the Fire Supply Axial Fan in the industry. Appendix: Axial Fan Working Principle - Axial fans have a wide range of applications; their airflow is in the same direction as the axis of the fan blades, such as in electric fans and outdoor fans of air conditioners, which are both operated in an axial flow manner. They are called "axial flow" because the gas flows parallel to the fan's axis.