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Title: The fan broke within 6 months..
Review: This dual fan, unlike others, did not have a switch to reverse the airflow. This would have been more convenient than having to turn the unit around if I wanted to change the inflow/outflow. It did however work fine in terms of enough power for my room (12x12). The problem was, one of the blades eventually came loose and fell off it's support. I was able to put it back on but it was a recurring problem and eventually that blade bent and was useless. If I had to do it all again, I would have bought a heavier duty fan.
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