BOREAS II 5 Blades Industrial Ceiling Fan

Short Description:

Huge Ceiling Fan BOREAS II 7.3M HVLS Fan

KALE BOREAS II series is a 5-blade smart selection product equipped with a traditional geared motor. BOREAS II applies the principle of aerodynamics and advanced technology to manufacture the Kale Airfoil Blades™ fan blades, which only use 1.5kW or less power. It can drive
a large amount of air (13500m³/min) to generate a large-area natural breeze system, which hasthe dual functions of environmental ventilation and personnel cooling. It can be called the best choice for ventilation and cooling in tall spaces!

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Product description

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

boreas 1


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


Solid Use high-strength material, such as forged steel, aircraft grade aluminum, solid & safe.
Brilliant 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.
Long-life: Use the most qualified components, ensure more than 15-year service life.
Fancy Large-scale production, high-integrated, decline in cost, fancy but not expensive.


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

Boreas II Series Ceiling Fan (2)


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.

Boreas II Series Ceiling Fan (3)

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.

Boreas II Series Ceiling Fan (4)

Airfoil blades

The aviation airfoil fan blade design is inspired by the aviation airfoil, with excellent aerodynamic performance, which can minimize wind resistance and at the same time convert electrical energy into kinetic energy of air with the highest efficiency. The fan is equipped with aerofoil blades, which can form a 1-3 meters high wind layer on the ground, creating a super large coverage area beyond the fan diameter.

boreas 2 扇叶

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!

Boreas II Series Ceiling Fan (6)


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.

Boreas II Series Ceiling Fan (7)


Model Size Air volume Max speed Fan weight Power Full load current Noise level
HVLS-D4BAA73 24ft(7.3m) 12100m³/min 60RPM 110kg 1.5Kw 3.2Amps/220V <40.0dB(A)
HVLS-D4BAA61 20ft(6.1m) 11200m³/min 70RPM 97kg 1.5Kw 2.5Amps/220V <40.0dB(A)
HVLS-D4BAA49 16ft(4.9m) 10300m³/min 70RPM 87kg 1.5Kw 2.5Amps/220V <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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