An axial fire smoke exhaust fan is a specialized ventilation device designed to remove smoke, hot gases, and toxic fumes from buildings during a fire, while also supporting daily ventilation needs. It is typically installed in underground garages, tunnels, industrial plants, large public buildings, and high‑rise structures as part of the smoke control and fire safety system.The fan operates on an axial flow principle: air moves parallel to the shaft through a cylindrical casing, driven by an impeller with aerodynamically shaped blades. During normal operation, it can function as a general exhaust or supply fan, providing fresh air circulation and maintaining acceptable indoor air quality. In emergency conditions, it switches to high‑temperature smoke exhaust mode, rapidly extracting smoke to maintain escape routes, improve visibility, and facilitate firefighting efforts.A key feature of an axial fire smoke exhaust fan is its high‑temperature resistance. The motor, bearings, casing, impeller, and cabling are designed to withstand elevated temperatures for a specified duration, commonly 280 °C for 2 hours or 400 °C for 1–2 hours, in line with relevant fire safety standards. Special heat‑resistant insulation, high‑strength steel materials, and enhanced cooling structures are adopted to ensure continuous safe operation under fire conditions.The fan casing is usually made of heavy‑gauge steel with reinforced flanges and stiffeners to resist thermal deformation and mechanical stress. The impeller is dynamically balanced to reduce vibration and noise while ensuring stable airflow. Depending on project requirements, the fan can be configured for unidirectional or reversible flow, allowing it to either extract smoke from a fire compartment or supply fresh air to pressurize stairwells and refuge areas.To support reliable performance, the motor may be placed in the airstream or outside the airstream using an extended shaft and cooling arrangement. High‑protection‑grade enclosures and fire‑resistant junction boxes are used to secure electrical safety. The fan is typically integrated with an automatic control system linked to fire detectors, smoke sensors, and the building management system. When a fire signal is received, the fan starts automatically, selects the appropriate speed, and works in coordination with fire dampers and smoke curtains.Installation can be horizontal or vertical, suspended from the ceiling or mounted on a support frame. Flexible connectors, vibration isolators, and maintenance access doors are often included to facilitate commissioning and servicing. Sound attenuators may be added if required by acoustic conditions.By efficiently extracting smoke and heat, an axial fire smoke exhaust fan helps to delay structural damage, protect escape routes, and reduce casualties and property loss. It is an essential component of modern fire protection engineering, combining robust mechanical design, high‑temperature resilience, and intelligent control to meet stringent life‑safety requirements.