I purchased my boat without any manuals. I found, luck for me, that the boat is equiped with an Air Conditioning System manufactured by Ocean Air Systems of Alexandria, VA. I called the telephone number listed on the air conditioning's label and ended up with BoatUS, ironic. The company is no longer in Alexandria or no longer in existence. By chance, does anyone have an Ocean Air Systems air conditioning/Heating system in their boat? The model number of my unit is RH17CH. I need an operations manual and/or instructions on its operation. Thanks, Mickey