How can dozens of 7.3-meter‑diameter large fans bring year-round benefits to a control valve factory in Ningxia?

In September, the diurnal temperature range in Ningxia has already widened, yet at Wuzhong Instrument’s control valve manufacturing base, the machining centers and assembly lines continue to run nonstop. In the 80,000-square-meter workshop, layers of hot air rise upward, leaving those on the floor feeling stifled.

Three years ago, cooling here relied on wall-mounted fans and a few spot‑type air conditioners: the airflow reached only the small area directly in front of each person, while hot air circulated under the roof. Installing full‑scale air conditioning, however, was both financially unfeasible and unsustainable in terms of operating costs.

After conducting an on-site survey, the chief engineer presented a straightforward plan— Dozens of HVLS industrial ceiling fans, each with a diameter of 7.3 meters. , with placement determined by column spacing and workstation density. Rather than relying on high‑velocity air blasts, these systems use large airflow volumes at low fan speeds to gently lift the air throughout the entire floor, creating a three‑dimensional, top‑down circulation: accumulated heat is dispersed, stale air is exhausted, and fresh air is continuously supplied.

The results are reflected in the data: during the summer, each workstation in the workshop is consistently swept by a stable airflow. The apparent temperature will drop by 5–8°C. ; Compared with the conventional combination of fans and local air conditioners, Total energy consumption has decreased by more than 60%. 。

As September begins, the role of this system becomes even more critical. The condensation caused by diurnal temperature differences can accumulate on equipment and workpiece surfaces, while a sustained airflow helps disperse the moist air near the ground; after winter sets in, switching… Reverse Mode , it forces the hot air accumulated on the roof down toward the ground, so the heating system no longer “burns up the roof.”

One piece of equipment, covering all four seasons. This is also the conclusion repeatedly validated by Dawang Ventilation at over 8,000 customer sites: A good ventilation plan shouldn’t be effective only in summer.