I have a 1998 Hunter 310. I'm looking to put A/C in the boat. I would like to know what size BTU's I should or could use. I'm thinking of 12000 Btu'S. What the demensions of the unit itself that someone else might have installed (lenght, height, width,). The height of the place I plan to install the unit is only 10.5. A surgestion of what make and model might fit into that compartment. Any help would be appreciated.