Wanhao D9 & Monoprice Maker Pro Mk.1 Upgraded Fan Duct

thingiverse

The Monoprice or Wanhao D9 prints poorly, with the fan being a major concern. It uses a standard 24v side fan designed for cooling hotends but instead employs it for part cooling. The fan duct is woefully inadequate, directing airflow under the nozzle and to the side. I experimented with multiple versions until discovering one that produced an excellent result. This outcome exceeds my expectations! Although the print sits slightly off-center, this version proved to be the best option. In the photos, you'll notice two benchy prints - one features version #1 and the other version #4, indicating four different iterations were attempted. Version #4 clearly yields a superior result as evident from the images.