A new automobile project in Cixi is located in the International Automobile City of Hangzhou Bay New Area. During the overall planning of the new factory building, strict comparison was made with various solutions such as post air supply, axial flow fans, and air conditioning ducts. The industrial energy-saving fan scheme was finally adopted, and the fan was designed as the overall ventilation solution for the factory building. The accessory workshop is about 20000 square meters, and 20 fan products were used. After application, the overall ventilation personnel were very satisfied with the cooling effect, and the effect was recognized and promoted to other available areas. Currently, the project is still ongoing.