A smoke exhaust fan is a mechanical device that quickly removes odors, high temperatures, and smoke gases produced during the food processing in a kitchen. It is characterized by good high-temperature resistance and high efficiency. The types of fans include centrifugal fans and axial fans, and the appropriate size of the machine is selected based on the space size and the arrangement of the exhaust hood. The HTF series of fire-resistant high-temperature smoke exhaust fans are products of the "Xinghuo" project, featuring excellent performance, good high-temperature resistance, high efficiency, less space occupation than centrifugal fans, and easy installation. The HTF fire fans have excellent high-temperature resistance: the fan tests comply with the GBJ45-82 fire safety standard requirements, and the company has established an internal control system that exceeds this standard, allowing continuous operation for over 60 minutes at 300℃ and for 20 hours at a time at 100℃ without damage, and are widely used in high-end residential buildings, ovens, underground parking garages, tunnels, and other locations. The performance listed in the performance table of the HTF fire fans is within the high-efficiency range, divided into five performance points by air volume; the selection should be based on the performance table. The qualified fire fans upon shipment have an error in total pressure within ±5% of the rated air volume, and the performance selection table is based on standard conditions, regardless of technical documents or order requirements.