BOREAS II Large Ceiling Fan

The BOREAS II series energy-saving industrial ceiling fan is a huge ceiling fan with a diameter of 7.3 meters! The Kale Airfoil Blades, manufactured by applying aerodynamic principles and advanced technology. BOREAS II can drive a large amount of air with a power of 1.5KW or less. BOREAS II has functions of both ventilation and cooling.


Sports Industry
Fitness center, gym
Large amusement park, zoos & arboretums, children’s playground
Traffic Hub
Airport, high-speed rail station, bus station, metro station, wharf
Commercial Places
Exhibition center, car showroom, large terminal market, supermarket


Use high strength material, such as forged steel, aircraft grade aluminum, solid & safe.
Use fluorocarbon paint technology, high gloss in appearance, brilliant under the light.
High Capacity of heat-transmission
Featured turbine air suction effect, improving heat-dissipation.
Use the most qualified components, ensure more than 15 years service life.
Large scale production, high-integrated, decline in cost, fancy but not expensive.

Main Components Tech

Gear Motor

Adopt imported Germany LENZE motor, and work with Germany company to develop geared motor for HVLS products.

1. Use low backlash assembly process and gear grinding technique, lower noise

2. Strength the bearing frame structure, increase oil seal and strength the motor structure with trapezoidal shaft structure, higher safety

3. Adopt IE2 high efficient motor, save more 5-10% than IE1

4. Passed CCC, CE, UL certificates


The hub made by 1500T hot forging, numerical control machining and CNC precise machining. Forging is able to confirm the consistency of metal structure, which can keep the inside structure and the outside shape of forged pieces consistent. Complete streamline structure of the metal confirms the best mechanical property of the hub. By CNC machining, the precision tolerance has been controlled in 100um, which guarantees the precise dynamic balance of the hub.

Control System

Top level electrical configuration in HVLS industry, Schneider brand electrical sets, with building safety protection module which will shut down the output automatically in case of some accidents.

Germany brand control cabinet, passed EMC by SGS and CCC certificates, meanwhile, passed anti-creeping tests which shields electromagnetic interference effectively. Protection level is IP55, passing UL, EMC,LVD, ROHS certificates.

Airfoil Blades

Adopt imported special high strength aircraft grade magnesium, PVFD processed in surface, and aerodynamics fan blade design. Kale new special patent—Kale Airfoil Blades, there is 3 sets strengthening support system inside, which increases the strength of fan blade and avoids the drop of fan blade tail and the loss and fatigue of fan blade to connecting pieces completely.

Connector for Fan Blade

KALE unique patented jacket-type connector adopt three cold forging process + magnetic force grinding process + anodic oxidation process, aviation hard aluminum 7050 aging heat treatment, certificated by the national quality inspection center, it bears more than millions of times of fatigue experiment, completely solve the break and drop problem caused by long time running!


The kind of empennage is always seen among airplanes and motorcycle races, but it’s not designed for beauty. Eddies will be formed in the end of the streamlined fan blade while airflow is running. With winglet, this part of energy loss will be avoided, fan will run steadily, which will bring economic effect.


Model Size Air volume Max speed Fan weight Power Full load current Noise level
HVLS-D4BAA73 24ft(7.3m) 13500m³/min 53RPM 110kg 1.5kW 5.7Amps/220V  3.5Amps/380V  <40.0dB(A)
HVLS-D4BAA61 20ft(6.1m) 12200m³/min 62RPM 97kg 1.5kW 5.7Amps/220V  3.5Amps/380V <40.0dB(A)

Installation Condition

We have an experienced engineering team on elctricity, machanism and architecture who will provide the most reasonable installation plan for different structures according to stress analysis, and can install fans for qualified structures.

We all know that intallation is a very vital process, so during it, strict norms & installation standards and our profession must eliminate all your doubts.

1. Customized installation plan;

2. Well-equipped with life truck;

3. Rich experience to debug the level, height and balance;

4. Dynamic balance test, make sure to run steadily;

5. Fasteners with torque standard, achieve the best fastening;

6. Brief & scientific installation process.


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