The stock fan on Wanhao i3 Plus printers is very noisy. In this video, I show how to install a Noctua silent fan and convert the 24v of the printer to the 12v necessary for the fan.
Note: This video was, during 1 week, exclusive to supporters of ADVi3++ on Patreon.
As your airflow can be different (i.e. less) than your previous one, be sure to check if your extruder motor is not heating up too much. Some people are feeding a little more power to the Noctua fan by adjusting the potentiometer to 14V.
This Mod is at your own risk.