A ship is disclosed. The ship according to an embodiment of the present invention comprises a louver formed in a hull to cover an opening part exposed out of the hull or installed within a gas inlet and outlet pipe opened into the opening part; a steam supply part supplying steam for driving a turbine; a first steam transferring part and a second steam transferring part where the steam flows; and a heater connected to the first steam transferring part and the second steam transferring part for radiating heat of the steam to the louver.
