11 Heat exchangers, apparatus for lighting, heating, steam generating, refrigerating, drying, ventilating, water supply, namely, water heaters for boats and vessels; apparatus for water supply, namely, spouts and shower heads for boats and vessels, apparatus for ventilating, namely, air purifiers for air dryers, dust exhausters, dust removers, air conditioning fans, filters for air conditioning, scrubbers and ventilators, for boats and vessels; apparatus for refrigerating, namely, air conditioners, air coolers, fountains, freezers, ice boxes, ice chests and refrigerators for boats and vessels; apparatus for steam generating, namely, steam generators, steam valves for boats and vessels; apparatus for lighting, namely, light fixtures and lighting units for boats and vessels; apparatus for lighting of boats and vessels, namely, bow lights, sidelights, running lights, dome lights and spot lights