Preheaters
Normally, when the engine does not warm up, it is impossible to increase the temperature of the coolant or the heat source for warming that flows through the frame. This system, however, uses a boiler to warm the coolant, allowing it to warm the railway car.
In addition to warming coolant in the engine and easily starting the engine during cold weather, it also works extremely well as an auxiliary heat source for a hydronic heater to conserve energy and provide comfortable heating.