The HVLS industrial fan was invented by an American company in 1999. After nearly 20 years of development, industrial fans with a variety of blades have been derived. Now the number of industrial fans at home and abroad mainly includes three blades, four blades, and five blades. , six leaves, and eight leaves. Theoretically speaking, the more the number of fan blades, the greater the air volume. However, due to the larger volume of industrial fans, the more blades, the greater the weight, and the greater the safety risk. Therefore, it is necessary to make a balance between air volume and quality. A good balance At present, the industrial fans on the market are mainly five-blade and six-blade. These two are also the main products abroad. They have also passed market certification for more than ten years. As long as the manufacturer has strict requirements on the quality and safety of Fan can meet the needs of the market.