Does anyone have knowledge of a slit a/c unit that has an outside unit with coils that are "salt air" protected? I have contacted Fujitso (no reply) and Mitsu who has told me that this is an after market addition. They gave me the name of "Bly Gold" as an after market company but no way of contacting them. Can't find them listed. Is coil treatment for salt air environs something I should even worry about? It was a big deal when I replaced the main unit a/c. As summer is here, I am one desperate lady with a grand child coming into a room I'd like to cool down. Thanks so much for any ideas.