7.2m Industrial Big Diameter Ceiling Fan

What is SIYI fans?
SIYI fan is a type of mechanical fan used in commercial and industrial settings. Unlike residential ceiling fans that are typically 36 to 52 inches in diameter, SIYI fans have very large diameters that start at 12 feet and go up to 24 feet. SIYI fans move very slowly unlike standard fans which operate at high speed. With large diameters and low rotating speed, SIYI fans can move large amounts of air, so it is named "high volume, low speed" (HVLS) fan.
HVLS fans are widely applied in livestock barns, warehouses, distribution centers, shopping malls, skating rinks health clubs and so on. Due to the rising costs of energy, HVLS fans are often used to supplement HVAC systems as they provide a stronger cooling effect while helping to maintain a constant temperature and humidity.

How to work?
The unique airfoil blades on the SIYI fan produce a massive, cylindrical column of air that flows down to the floor and outward in all directions. This horizontal floor jet pushes air a greater distance before it begins to move vertically and is drawn back through the fan. The greater the down flow, the greater the air circulation will be.

IN SUMMER
HVLS fans work on the principle that a breeze moving across your skin on a very hot day feels good. The cool moving air breaks up the moisture-saturated boundary layer (also known as sweat) surrounding the body and accelerates evaporation to produce a cooling effect.
IN WINTER
In a closed space, heat air always gathers on the higher space. That is why in the large commercial space, even if we turn on the air conditioner to the largest point, people on the ground still feel cold. It happened HVLS fans can eliminate the separation of the cold layer and the heat layer and make the heat air circulate well.

INDUSTRIAL GRADE MOTOR

After repeatedly tests, we adopt Germany NORD motor to ensure the low noise, efficient, reliable and durable operation. The motor is free lubrication for life and any potential oil leakage is prevented by the double lip seals.

AIRFOIL SYSTEM

The flabellum is the core technique of the fan. Our fans have six or eight PCS of blades and winglets to ensure maximum airflow and efficiency.
Unique designed winglets at the airfoil tips greatly eliminate wind noise.

CONTROLLER

The overload protective device in controller box can automatically disconnect the power supply once accident occurs. So safety is assured. You can regulate the wind speed at will by rotary switch.