The HTF fire‑exhaust fan is part of the HTF(A) series and features a multi‑objective optimized design developed using CAD software. It is equipped with a molded axial‑flow impeller, an integrated high‑temperature motor, and a dedicated motor cooling system. A dual‑speed motor with direct‑drive transmission enables dual functionality—providing routine ventilation and, in emergency situations, high‑temperature smoke extraction. When fitted with an electrical control cabinet, it can be operated remotely and automatically.

　　The HTF fire‑exhaust fan is part of the HTF(A) series and features a multi‑objective optimized design developed using CAD software. It is equipped with a molded axial‑flow impeller, an integrated high‑temperature motor, and a dedicated motor cooling system. A dual‑speed motor with direct‑drive transmission enables dual functionality—providing routine ventilation and, in emergency situations, high‑temperature smoke exhaust. When fitted with an electrical control cabinet, it can be operated remotely and automatically.

　　This series of smoke exhaust fans boasts excellent high-temperature resistance, high efficiency, a compact footprint, and easy installation—compatible with horizontal, vertical, or suspended mounting.

　　HTF fire‑fighting smoke exhaust fans are widely used for fire‑fighting smoke extraction and supply/exhaust ventilation in high‑rise buildings, drying rooms, underground parking garages, subways, tunnels, and other applications. In accordance with the GA 211‑1999 test method for high‑temperature resistance of fire‑fighting fans, these units can operate continuously at 400°C for more than 100 minutes and, under medium temperatures of 100°C, can run continuously for 20 hours per cycle without damage. They have been approved and adopted by fire departments across major cities nationwide. Depending on installation and operational requirements, this series of fans can be equipped with an external silencer housing to form the HTF(A)‑X box‑type fire‑fighting smoke exhaust fan.

　　HTF Fire-Fighting Smoke Exhaust Fan Installation Procedure

　　1. Thoroughly familiarize yourself with the fan’s product catalog, including its specifications, configuration, impeller rotation direction, and inlet/outlet airflow orientation. Prior to installation, inspect the impeller for any signs of rubbing or impact, and conduct a comprehensive check of all components to ensure that all accessories are present and that all connections are secure. Carefully examine the fan blades for damage or deformation incurred during transportation; if such issues are found, the fan must be repaired before installation.

　　2. The ductwork connecting the fan’s inlet and outlet shall be supported independently; the weight of the ductwork must not be borne by any component of the fan. During installation, ensure the fan is properly leveled, and adjust the interface between the fan and its foundation as well as the connection to the discharge duct so that they align naturally—do not force the connections.

　　3. After the fan is installed, manually or with a lever rotate the impeller to check for excessive tightness or rubbing, and ensure there are no obstructions hindering its rotation. Only proceed with a trial run if no abnormalities are detected. The exposed parts of the fan’s drive mechanism must be equipped with protective guards (provided by the user). If the fan inlet is not connected to a duct, a protective grille or other safety device must also be installed (provided by the user).

　　4. The fan’s wiring must be correct and reliable; the fan housing must be properly grounded, with a secure and dependable earth connection. The power supply to the fan must be complete and comply with applicable requirements. Electrical wiring must be performed by qualified electricians with appropriate expertise.

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