Review on 💨 High-Performance GDSTIME 140mm x 38mm 12V Dual Ball Bearings Brushless Dc Cooling Fan - Ultimate Cooling Solution by John Bourgeois

Attempts to change the speed on this fan were unsuccessful. I contacted the company and they said change the power supply. I wanted to know what kind of speed controller to buy as the 2 potentiometers and 2 speed controllers just turn this fan on and off at different intervals. A pot is smoked. If you read customer questions, the very first and fourth questions are specific to speed control. Speed. If you want a fan that runs at full capacity, this fan moves a lot of air but is quite noisy at top speed. Too noisy for an RV exhaust fan unless you can slow down a bit.