Great fans! Really move the air. I use 2x of this on a lifted dirt truck. The original mechanical fan was constantly being bent by dirt and rocks. They draw a TON of current, over 30A each. Both require a 120A relay to power them. Most cheap fan harnesses will not fit. I actually had to install a larger generator to power both! I can now turn off the fans BEFORE walking through the mud swamp and turn them on to cool it down quickly when I exit (when I exit?). Other electric fans I've tried just didn't have balls.