Exhaust blowers on diesel boats are primarily used to:

The primary function of exhaust blowers on diesel boats is to remove volatile vapors. This is crucial for safety in the engine room, as diesel engines can produce flammable vapors that, if allowed to accumulate, could lead to hazardous conditions. By effectively ventilating the engine room, exhaust blowers help maintain a safe atmosphere by minimizing the risk of fire or explosion caused by these vapors.

While keeping engine room temperatures cooler can also be a benefit of proper ventilation, it is not the main reason these systems are installed. The focus is primarily on vapor removal for safety. Although exhaust blowers can provide benefits in case of an engine room fire or impact on cooling down hot spaces, their primary design and function revolve around managing volatile gases and maintaining a safe environment in the engine compartment.