This series of fans is equipped with a dedicated motor cooling system. This series is a new product developed to support the drying industry, boiler industry, cleaning industry, painting industry, and food drying industry; The operating temperature ranges from 100 ℃ to 180 ℃; The transported gas is air or other unnatural, non explosive, non entangling, harmless to the human body, and non corrosive to steel materials. It can also be used to transport non corrosive gases in various industries. Unnatural hot gases, vapors, and smoke that do not contain viscous substances. Other materials with similar performance can also be selected, but the temperature of the conveying medium must not exceed its rated temperature range.