Excellent fan. It moves a lot of air. I did a lot of research before buying. From my research, direct drive fans are more energy efficient than belt drive fans. It moves a significant amount of air for the power required. I have no way of measuring the airflow. However, I measured the performance. The motor reads 4.3 amps. I don't know if that's just overall performance, but mine doesn't draw that much current. Here's the power I measured: Low: 223W Medium: 260W High: 370W For what I do, I basically just need to feel the air movement in all areas of my building. This fan helped me at low speed (actually I installed 2 fans to circulate the air in my big building). I highly recommend!