SUNON: Large Fans for Large Spaces – Energy-Efficient and Quiet

Figure 1: SUNON HVLS fans are suitable for large rooms and halls. (Source: SUNON)

What are the challenges of air distribution in large spaces?

Air distribution in large rooms and halls presents specific challenges. One of the key challenges is ensuring consistent air circulation across extensive areas. In practice, zones with little air movement often develop, while other areas experience stronger airflow. These types of buildings also tend to have considerable ceiling heights, which can lead to temperature stratification and air layering. Warm air is lighter than cold air and therefore rises, while cooler air remains near the floor. Without sufficient air mixing, this can result in significant temperature differences and increased energy consumption. This uneven distribution requires the use of large fans to ensure uniform airflow and temperature distribution throughout the space.

Figure 2: The selection of the appropriate fan depends on the ceiling height and the distance between the rotor blades and the floor. (Source: SUNON)

What are the key features of the SUNON HVLS series?

SUNON's HVLS fans are designed to provide uniform air circulation in medium-sized and large spaces (Fig. 1). Thanks to their slow, low-noise airflow and high air volume, they effectively balance temperature and humidity differences. Selecting the right model depends on the ceiling height and the distance between the rotor blades and the floor (Fig. 2). The large fans of Series 1, 3, and 10, with diameters ranging from 1.5 m to 7.3 m, are used in medium-sized and large spaces, covering effective areas from 80 m² to 2,600 m². Typical applications include production facilities, warehouses and logistics centers, sports venues, exhibition halls, airports, and aircraft hangars (Fig. 3). They offer high energy efficiency combined with low power consumption while generating a gentle and comfortable airflow. In addition, the direction of rotation can be reversed. Compared to large air-conditioning systems, they are generally easier to install. More compact models with diameters of approximately 1.3 m to 1.5 m are designed for smaller halls and larger indoor areas. They can be operated individually or in groups and are conveniently controlled via remote control with multiple speed settings. No certified electrician is required for installation. The portfolio is complemented by industrial versions that can either be wall-mounted or used as mobile floor-standing units. Both variants achieve airflow distances of up to 36 m and are protected by a safety guard.

What is the energy-saving potential?

The energy-saving potential of SUNON's HVLS fans can be demonstrated using the technical data published by the manufacturer. Looking first at power consumption, Series 1 can operate for 12 to 18 hours using only 1 kW, while the series 3 requires just 5 W to 50 W of power.

A significant economic advantage, however, lies in reducing the load on air-conditioning systems. Under moderate temperature conditions, HVLS fans can completely replace air conditioning. During summer, they increase the perceived cooling effect by 5 to 8 °C, allowing the air-conditioning system to be set to a higher temperature and thereby reducing energy consumption. In winter, the reverse operation mode redistributes warm air accumulated near the ceiling back into the occupied zone.

As a result, HVLS fans can reduce both cooling and heating costs by 25% to 30% when used in combination with an HVAC system. This energy-efficient performance is made possible by the BLDC motor technology that SUNON has been developing for more than 40 years. The Taiwanese manufacturer utilizes gearless direct-drive motors that optimize airflow patterns and increase air coverage by more than 20% compared to conventional solutions.

Figure 3: In industrial facilities, HVLS fans ensure uniform air distribution across large areas. (Source: SUNON)

How safe is the operation of SUNON HVLS fans?

Research, development, and manufacturing of SUNON HVLS fans are carried out entirely in Taiwan. The safety concept is based on five levels of protection and includes the use of environmentally friendly materials as well as recyclable packaging. Before shipment, each fan undergoes six defined quality assurance processes. SUNON specifically inspects welded brackets, redundant connections, and dual suspension systems. In addition, an intelligent monitoring system provides eight electrical protection mechanisms against overcurrent, overvoltage, overheating, overload, short circuits, voltage surges, rotor lock, and the windmill effect.