Hella-va-fan
I bought Hella fans for the salon and they run very economically. Very little power draw. They are quiet, but one drawback is that they do not oscillate. But in a salon, that isn't too bad if you use two of them. About $60 each.For the berth, we bought Caframo fans that fold flat, set on a flat surface, and are powered by 4 "D" batteries. They will run all night, all season on those batteries. I use older flashlight batteries to finish them off in the fans. They do not oscillate, but you can adjust the fan speed so that you can leave if pointed directly at you. They sell at all the camping and boating stores for around $20/ea. Sometimes you can find them at a department store in the camping section.See the related link