The fan is fantastic. Very powerful. One important piece of information was left out about the product... Namely... The fan is RADIAL in design. There is a buffalo-powered motor in the middle of the shaft. Radial blades on both sides of the shaft. The fan is much more powerful than I expected. I use it to spread warm air in the room when heating. (Air conditioning heating!) It is excellent for that. The walls are warmed up by it. After ventilation, I "shoot" the air in the middle, then it flows from top to bottom along the edges. This heats up the outer walls. Then I turn it off.