Fan transmission medium is air, the maximum temperature does not exceed 80 °C, Fan transport medium for the gas, the maximum temperature not exceeding 250 °C. In the draft fan prior to the installation of not less than 85% of the dust removal device to reduce the dust content of flue gas into the fan, help to enhance the fan's life. Fan type: 1. Fan and Fan made of single-suction. 2. Each fan can be made of D-and L-two types. From the motor side, the impeller clockwise rotation of the right-hand fan, in order to "right" that; counterclockwise rotation for L fans to "left". 3. Fan location to the export point of view, said enclosure outlet. "Left" "right" can be made of 0 °, 45 °, 90 °, 135 °, 180 °, 225 ° total of six angles. 4. Fan drive way D-type, motor and fan links are direct drive with flexible coupling.