What is HVLS fan?

  • HVLS industrial Fan is a super larger energy-saving fan with a diameter up to 7.3 meters (24ft).
  • A power of 1.5kw or less, with High Volume(13,500m³ /min) of air at a Low Speed, cools up to 1000 square meters.
  • Produce a large volume of natural wind, which leads to wind chill effect with space ventilation, as well as dehumidification.
  • The Ideal solution for air circulation in large space area with certain hight.

Application Area


Market & Mall



Bus Station

Fitness Room



And all other TALL AND LARGE spaces which is higher than 4.5 meters.

Wind Chill Effect

The gentle breeze brings by HVLS fan to our body can accelerate sweat evaporation and make people feeling cool, usually this sensible temperature created by wind chill effect can be 5-8℃, in addition, the gentle wind from all sides will make people more comfortable compared with traditional powerful fan.

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’s body, and this evaporation process takes away 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.

Space Ventilation

Usually the ventilation is restricted in a tall and big space, and the exhaust fan can barely work for the 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 air cooler or roof ventilator, to improve the air quality and achieve a healthy and comfortable working environment.


HVLS fan facilitate the flow of air and dispense the damp, to improve the comfort level for people in the house.

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 Normal 30% 40% 50% 60% 70% 80%
Inside Air With HVLS FAN 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%

Product Advantages

  • commercial ceiling fans
  • commercial ceiling fans
Large area coverage
more than 1000 m²
Tridimensional wind
from all directions
gentle breeze
Space saving and
elegant looking
Maintenance free,
long life span.


Model Fan Dia. (M) Motor Power (KW/HP) Voltage (V) RPM Air Flow (m³/min) Applicable Area (SQM.) Noise (DBA)
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
  • Denmark “DANFOSS” frequency converter & German “Schneider” electrical sets.
  • Step-less speed regulation with malfunction protection.
  • IP55 protection level and NEMA1 standard controlling box.
  • Operation temperature range -10 ~ 55 ℃.
  • German “Nord” customized coaxial bevel reduction gears with diameter of axle 40mm.
  • German “Simrit” double oil seal design, durable and reliable.
  • “Shell” top class “Omala” S4 lubrication oil, zero maintenance for over 20000 hours.
  • PMSM(Permanent Magnet Synchronous Motor) technology with high efficiency and long service time.
  • Compact and light design, no space limitation and easy to install.
  • Direct drive, without gear, no need lubrication oil replacement, essentially silent and maintenance free.
  • Innovative double chassis design, more durable and steady
  • Imported aeronautic aluminum alloy (AA7075).
  • Forged by 1000T machine with 570Mpa extension strength.
  • T6 heat processing.
  • High strength aircraft aluminum alloy:AA6063T6511 with PVFD surface coating.
  • Patented airfoil design, special designed reinforcing rib support system to increase both strength and flexibility.
  • Inner equipped steel cable to prevent fan blade cracking(Optional).
  • Customized fan blade color.
4 steel cable from different direction to pull the motor to prevent waggling and keep balance, each cable can sustain 1000kg stress.
Unique cardan joint design, working as a human beings’ joint, to decrease the vibration and keep fan best balanced during operartion.
All fasteners enjoys industrial level strength 8.8 Grade, durable and steady.

Compared with Powerful Fan

Area Coverage


Comfortable Level


Life span

  • Cover 1800m² per unit with 13200m³/min, full space covered with its 7.3m diameter fan blade.
  • Installation by mounted to ceiling, simple and elegant.
  • Tridimensional and natural breeze from all direction, with most comfortable wind speed 1-3m/s, with less noise.
  • Almost zero maintenance
    after proper installation.
  • 8-10 years.
  • Wind can only reach to the area in the front of the fan, can not work well if people frequently move.
  • Mounted on the wall or standing on floor, need space to put or store.
  • Long time exposure to high speed wind will cause dizziness,
    noisy during operation.
  • High failure rate, and need maintenance and cleaning frequently.
  • 3-5 years.

Compared with Powerful Fan

HVLS Fan Powerful Fan
Fan Diameter (m) 7.3 0.75
Power (kW) 1.5 0.36
Air Flow (m³/min) 13,500(810,000) 300(18,000)
Effective Area (m²) 1,500 30
Factory Area 9000m² 9000m²
Total Units installed 6 300
Total Kw Installed 9 108
@10hrs/day @26 days/mth
28,080 336,960

Cordinate with AC

During Spring or Autumn when temperature keep in a range from 20-34 ℃, for those space with AC system, it’s awkward to decide if need to run the AC system, while with HVLS fan, you can forget the electricity bill caused by AC system!

It cost a huge when AC system fully running, while the HVLS fan can spread the cold air into every corner of the space during AC running, make it more well proportioned.

In addition, testing shows that we can save power consumption 20% by setting AC temperature 1℃ higher, HVLS fan can shorten the running time of AC or decrease the running quantity of AC, but achieve a same cooling effect!