I live in central Texas where it gets fairly warm. In 100+ degree temperatures, I run the A/C until about 8:00. Then, I switch to, believe it or not, an
O2Cool desk fan that takes two "D" batteries, and sits on my bedroom's nightstand. It is quiet, and moves enough air in the middle of the night to keep me cool enough so I don't have to have the loud A/C on at night. However, once 10:00 in the morning rolls around, it becomes A/C time one again.
In cooler climates, I'd just go for the
fan mentioned above, which should push enough air to keep you comfortable. If it doesn't do the job, its
big brother, an 8 D cell operated fan does the job well. I've used the larger one tent camping in Texas summers, and it kept me cool enough to sleep.
I prefer battery operated fans when RV-ing because they work regardless of what type of power I'm on, be it full electric, generator, or just 12 volt battery power. The 12 volt system can even be disconnected (likely because it is outside generator hours, and I don't want to damage the jars) and the fans are still operable.
The downside is changing batteries. You can use "D" cells, which for me will last about 7-10 days, using the batteries at night for ~8 hours. You can also use "AA" batteries with an adapter to make them work as "D" cells, as well as a battery charger to compensate for the ampere-hour loss.
Even when it is freezing out, and I have my furnace cranked up, I still like moving air, so I like keeping a fan running regardless.
