A Jacket Water Heater is part of an internal combustion engine's cooling unit to warm the engine's coolant to an optimal temperature before it enters the engine block. This preheating process is used for ensuring efficient engine operation, during cold starts and in cold weather conditions. It helps to minimize energy consumption while effectively raising the coolant temperature.

Attributes:
• Capable of producing a maximum power output of 9 kilowatts
• Ensures efficient heating of engine coolant

Applications:
A Jacket Water Heater ensures that the coolant is heated to the optimal level for engine operation, promoting fuel efficiency and reducing emissions, while reducing wear on engine components during cold starts.