Used it for about a year, a few times a week, only in the summer, in SF. Moved and didn't use it for a year, but when we did, the fan blade was stiff, got it going and a week later the motor died. The front barrings, or what ever they use, were shot. Ball barrings are a perfected tech, should have lasted for years. While it worked it was a great fan, especially with the ability to close the window without removing fan.