I am using this for cooling a self built solar generator. I have two stackable tool chests with wheels, and have two 12V batteries, AC charger, solar charge controller and a 1500W pure sine wave inverter installed in these chests. All of these components generate heat when in operation. This fan, in conjunction with two other fans I bought from Cooler Guys, are working flawlessly. They move lots of air, and they do it quietly. Cooler Guys also sells a fan controller that brings it all together.
I am super happy with the performance and quiet operation of this fan. Unfortunately I cannot take advantage of the speed control. It is still a great value for the price and I give it 5 stars.