Action fans and centrifugal fans in mechanical ventilation in a grain temperature due to the temperature difference between the larger and the first time to choose the ventilation axial fans during the day, in order to reduce the gap between food mild temperatures, reduce condensation occurs. After ventilation as much as possible at night, because this is a cool ventilation valve axial fans dominated the evening relatively high atmospheric humidity, low temperature, so that reduces moisture loss, but also take advantage of the low temperature at night improve the cooling effect. A centrifugal fan duct flow changes within the medium, while axial fan does not change the flow of the medium within the duct; two, the former air volume and pressure axial fans are great quotes, which are very low air volume and pressure; 3, the former installation is more complex, which is relatively simple to install; 4, the former motor and fan are generally connected by a shaft, which is generally in the fan axial fan motor 380, Plumper ventilation equipment (certified), axial fan ventilation by Dezhou Plumper plant available. Dezhou Plumper ventilation plant (www.frtfsb.com) (www.frtfsb.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum limits to meet customer needs. Rich ventilation equipment in leadership with the staff warmly welcome all inquiries negotiations to create rich, ventilation a better future.