The horizontal drum cooler is designed for uniform cooling and drying of granular products or oilseed cakes. The system is equipped with a suitably powerful suction device that generates an air flow countercurrent to the movement of the product, allowing an effective exchange of heat and the progressive lowering of the temperature to values close to room temperature. The rotating drum has blades inside that lift the product with each rotation, creating a “cascade” effect that continuously exposes the mass to the flow of cooling air. This principle provides high cooling efficiency, optimizing dwell time and improving final product quality. Sturdy and reliable, the drum cooler is particularly suitable for processing high volumes continuously, ensuring uniform and consistent results.