A typical gas cooler is designed with the hot waste gas flowing vertically down over the outside of horizontal tubes, while cooling air passes inside the tubes. A large volume of cooling air is usually provided by multiple vane axial or panel fans mounted on the side of the cooler.
A complete system is normally supplied including tube bundles, outer shells, cooling fans, ducts, hoppers, structural supports, walkways, etc. Other cooler arrangements and orientations are also available including designs with the hot waste gas passing inside the tubes.