Step into the Wuxi Intelligent Manufacturing Workshop of Dawang Ventilation and witness the birth of a W28 unit.

In Yanqiao, Huishan District, Wuxi City, an 8.5-meter-diameter W28 “Wind King” fan is awaiting shipment. Each unit covers an area of over 1,800 square meters, delivers a full‑load airflow of 21,800 cubic meters per minute, and consumes only 1.5 kilowatts per hour—figures that rest on four indispensable technological hurdles.

Level 1: Fan Blades. Five aerodynamic blades with a variable cross-section narrow from 304 mm at the root to 186 mm at the tip, and thin from 43 mm to 21 mm, ensuring more balanced load distribution, more uniform airflow, and eliminating any voids in the center. The blades are die-cast from aerospace-grade aluminum alloy and feature an anodized surface for corrosion resistance.

Level 2: The Motor. Our proprietary PMSM permanent‑magnet synchronous direct‑drive motor delivers a stable torque of 320 N·m and meets the IE4 high‑efficiency, energy‑saving standard. Featuring a gearless design with a fully sealed construction, Lifetime maintenance-free , no oil seal replacement required; operating noise as low as 38 dB.

Level 3: Safety. Suspended at a height of over ten meters, safety is the bottom line. A mortise-and-tenon structure, reinforced connectors, cushioning chambers, fall‑prevention rings, and balancing steel cables—12 layers of protective safeguards, combined with a series of extreme‑condition tests prior to market release, ensure that the entire unit remains secure and does not loosen or fall under demanding operating conditions.

Level 4: Intelligence. Each fan must be connected to the DAWANG BOX: a single system can centrally control up to 48 units, providing real-time monitoring of operating parameters, motor temperature rise, and equipment levelness. It supports remote control via a mobile app, as well as integrated temperature–humidity and fire‑alarm interlocks, and offers proactive fault alerts.

From a single piece of aluminum to a “wind‑power champion,” the journey is underpinned by more than 45 patents, an ISO 9001 quality management system, and rigorous factory audits conducted by TÜV Rheinland.

Let the world bask in a gentle spring breeze. —This phrase is inscribed on the workshop wall and etched into every piece of equipment that leaves the factory.