Review on Optimized for SEO: Waterproof IP67 High Airflow 140mm (140x140x25) Fan by Coolerguys by Jason Carranza

Cooler Great support guys! Respond quickly and help. This fan is simple and consistent. The picture of the connection in the listing helps, even if what you get looks a little different. The first was very quiet and I'm working with them on the second to get rid of the slight hum. I'm using it in a solar powered system to extract hot air from a small chicken coop and it's reliable.