Who manufactures dairy barn ventilation fans in China

China has become the world's largest producer and exporter of agricultural ventilation equipment, and dairy barn fans represent a significant and growing segment of that industry. With heat stress costing the global dairy sector billions of dollars annually in lost milk production, Chinese manufacturers have positioned themselves as key suppliers of ventilation solutions for dairy operations worldwide. Understanding who these manufacturers are, where they cluster, and what they produce provides valuable insight for farm operators, importers, and industry observers.

Chinese manufacturers have responded to this demand with a diverse range of products—from massive ceiling fans and hanging circulation fans to wall-mounted exhaust fans and comprehensive environmental control systems. The country's manufacturing ecosystem, built on decades of industrial fan production experience, now supports a thriving export trade to dairy markets across Southeast Asia, South America, the Middle East, Africa, and beyond.

Several established Chinese companies have built strong reputations in the dairy barn ventilation sector. Each brings distinct strengths in product design, energy efficiency, and export capability.

WEIFANG HIPAI MACHINERY  Co., Ltd. stands out as one of the most experienced players. Founded in 2008 and based in Shandong Province, the company operates a 20,000-square-meter factory and specializes in environmental control systems for livestock farming. Its product range includes fiberglass wall fans, galvanized box fans, roof fans, air coolers, and cooling pads. Hipai has integrated its supply chain vertically, operating its own motor workshop, FRP workshop, fan blade workshop, and automated fan assembly workshop. The company holds ISO9001, CCC, and EU CE certifications, and its products are tested by Bess Lab, a recognized independent testing facility for agricultural fans.

Shanghai Terrui International Trade Co., Ltd. is a major supplier of livestock circulation fans, with products engineered specifically for dairy and industrial agricultural environments. Terrui's portfolio includes heavy-duty fans with blade diameters up to 1,830mm and motors rated at 2,000W, capable of generating airspeeds of 6.2 m/s at distances of six meters—a critical performance metric for effective heat stress relief in freestall barns. The company offers both PMSM and EC motor options and has developed IoT-enabled control systems that allow farmers to manage ventilation remotely via app or PC.

Product Types and Technical Trends

Chinese manufacturers produce four primary categories of ventilation equipment for dairy barns:

Hanging circulation fans are among the most common products. These fans are suspended from barn ceilings or structural columns and are designed to circulate air at cow level, breaking up stale air pockets and creating a consistent breeze across the herd. Airflow capacities range from approximately 15,000 m³/h for smaller models to over 55,000 m³/h for larger units.

Large-diameter ceiling fans (HVLS fans) operate at low speeds and cover wide areas, making them suitable for large freestall barns. Diameters typically range from 3.6 to 7.3 meters, with coverage areas of up to 2,400 square meters per unit.

Wall-mounted exhaust fans are used in tunnel ventilation systems, where a series of fans along one end of the barn pulls air through the entire length of the building. These are commonly used in combination with evaporative cooling pads for maximum temperature reduction.

Roof ventilation fans provide continuous air exchange through the barn roof, helping to remove hot air and moisture without relying solely on side-wall opening