I shortened the height so I could use the original air duct. You can stick to the print instructions in the original model I just changed the size. Due to the temperature, PLA is a problem as it gets closer to the plate. The original air duct is both heat resistant and more successful in directing the air to a single point.
The author remixed this model.
Height changed 85mm to 78mm. The fan part stays as it is, I don't think it will cause a problem in terms of functionality.