Fans play a crucial role in the field of construction engineering, running through all aspects such as construction, decoration, and environmental control. In large-scale construction projects, fans are mainly used for tunnel ventilation, basement air exchange, and concrete curing, among other critical processes. Tunnel construction cannot do without high-power axial flow fans, which continuously supply fresh air to the deep part of the tunnel while removing harmful gases and dust produced by blasting, ensuring the safety of construction workers. In underground space construction, explosion-proof centrifugal fans form a complete ventilation system, effectively solving the problem of air circulation and preventing the accumulation of harmful gases. During the exterior wall construction and interior decoration stages of high-rise buildings, fans are used in conjunction with spraying equipment, which not only improves spraying efficiency but also promptly discharges volatile organic compounds to protect workers' health. Modern buildings increasingly attach importance to indoor air quality. The fan coil units and fresh air units in the central air conditioning system precisely control the airflow organization to provide fresh air for the interior. Firefighting smoke exhaust fans are also an important guarantee for building safety, being able to quickly discharge thick smoke during a fire and providing valuable time for personnel evacuation. To meet the needs of the construction industry, engineering fans are constantly undergoing technological upgrades. Low-noise designs avoid interference with the surrounding environment, energy-saving motors significantly reduce operating costs, and intelligent control systems enable remote monitoring and automatic adjustment. Under the impetus of the green building concept, new air conditioning units with heat recovery functions are increasingly favored, as they can recover energy while ventilating and exchanging air, significantly reducing building energy consumption. With the rapid development of prefabricated buildings and intelligent buildings, fan products are evolving towards modularization and intelligence, using Internet of Things technology to achieve coordinated control with other building equipment, providing more efficient and environmentally friendly air treatment solutions for modern construction projects.