• BLDC HVLS fan is a super large energy-saving fan with diameter from 2.4M to 4.2M.
  • It was developed by the “founder” of China’s HVLS fan and China’s top research institute—Tsinghua University. Adopt BLDC motor, with lots of excellent features, better dynamic performance, high efficiency, long service time, lower noise and wide speed range, is the highest level in HVLS industry around the world.
  • Compared with the traditional HVLS industrial fan, the BLDC HVLS fan has superior advantages in application, light weight design, beautiful appearance and more space-saving.
  • The BLDC HVLS fan is widely used in commercial space like Gyms, Stadiums, Fitness clubs, Restaurants, Hotel, Meeting room etc.
Voltage (V): 24/48 Working Area(㎡): 800
RPM: 70 Airflow(m3/m) 8000
Fan Dia(M): 4.2 Power(kw/HP): 0.8


  • It is the secondary cooling effect when air passes over human skin (Similar to a fan created effect) thereby causing a lower temperature sensation.
  • How to make people feel cooling down 5-8℃
  • The running of big diameter fan blade accelerate the air flow, and increase the evaporative efficiency of the sweat on human being, and this evaporation process take away the heat in body, that’s called wind chill effect.
  • As for the specific influence created by different wind speed, please see above graph, which can show you different temperature with different wind speed to make the difference that people feeling.


  • Usually the ventilation is restricted in a tall and big space, and the exhaust fan can barely work forthe floor or corner of building where people and equipment located, while HVLS fan can solve the problem completely by sending a well-aligned wind in full space, coordinated with the roof ventilator, to improve the air quality and achieve a healthy and comfortable working environment.


  • HVLS fan can accelerate the air mixing of whole space which helps to distribute and absorb the odors, smoke and humidity very well, thus to improve the quality of air and provide a fresh, arid and safe environment.
Inside Air
30% 40% 50% 60% 70% 80%
Inside Air
27% 35% 43% 50% 58% 65%
Dehumidification 3% 5% 7% 10% 12% 15%
Reduction Rate 10.00% 12.50% 14.00% 16.67% 17.14% 18.75%


Model Fan Dia.
Motor Power
RPM Air Flow
Applicable Area
RTF-SF-4E 4.2 800 24/48 0~70 8000 800 42
RTF-SF-3E 3.6 680 24/48 0~80 6000 720 40
RTF-SF-2E 2.4 680 24/48 0~80 4500 660 40


Wheel Hub
Motor System
Control System
Fan Blade
Wheel Hub

  • Use SKF bearing, CNC high precision carving technology, high precision assembly, which guarantees the stability of transmission system and service life.

Motor System

  • Developed by the “Founder” of China’s HVLS industrial fan and The top research institute—Tsinghua University
  • BLDC technology, with lots of excellent features, such as Low speed and great torque, better dynamic performance, high efficiency, long service time, lower noise and wide speed range
  • 48V safety voltage

Control System

  • VFD(Variable Frequency Driver) inverter
  • IP55 motor protection grade and NEMA 1 standard control box lWith earth fault, overheating and short-circuit protection
  • Control system

Fan Blade

  • High strengthaircraft aluminum alloy:AA6063T6511, PVFD processed on surface
  • Patented airfoil design, and special reinforcing rib support system, which increases the strength of fan blade and avoids the sagging of fan tail and fatigue loss of connecting components
  • Customized fan blade color