Air Fan Cooler is an air-cooling type heat-exchanger that used for cooling lubricant oil and process-fluid by using fan and motor. 
The air is generated by fan and motor, and it is used as cooling medium instead of cooling water, therefore it can be workable in where cooling water is hardly supplied. 
The heat transfer coefficient of air is not greater than that of water, so that High Fin Tube is applied to increase heat transmission area. Generally, two types of cooler are available; Forced Draft Type that fan is attached just under the bundle and the air flows from down to up; and Induced Draft Type that plenum chamber and fan are attached on bundle and the air flows from up to down.