The POWERHEAT preheater for (diesel) engines is a compact, electrically operated circulation heater. Using a new and innovative heating technique including a large aluminum heating surface, the POWERHEAT preheater protects the engine life and quality of the liquids. The compact and robust design provides a high-quality system that offers high shock resistance. The POWERHEAT preheater is designed for use in a wide range of applications, such as powergen, marine, industry, railroad, automotive, on- and offshore, on- and off-highway, etc.