Advantages centrifugal fan: cooling, precipitation effect is obvious, ventilation time is short; Disadvantages: high energy consumption; ventilation timing was bad prone to condensation. Conclusion: In order to cool down for the purpose of ventilation, the application of axial fans safe, efficient, energy-efficient ventilation retarder; centrifugal fan application in order for the purpose of ventilation in precipitation. Installation issues a fan lying to the shock absorber mounting bolt to the fan by connecting the base, with center height adjustment plate adjusting the height of the axial fan damper level price, fixed bolts fixing the fan to have welded on the basis of the coupling plates, such as fans because of the earthquake and other reasons without shock absorbers, embedded bolts directly connected to the screw and then the fan base on the base unit. Yantai axial fan axial fan _ _ Rich ventilation equipment provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (www.frtfsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!