I own a martial arts school that uses these fans daily. They are quite large, installed high on the wall (out of the way) and push a lot of air. Normally, just on the low setting, both of these fans circulate around 1000 sq ft of training area. On higher settings, the only negative is the sound is high. It's not the motor, it's the fins pushing the air. In short, this noise is unavoidable and I knew that from past experience. Very satisfied with the fans.