A Better Fan Shroud I already updated my 3D Printer fan shroud a couple of months ago. It should cool the filament more effectively and evenly. I think it did a good job. Unfortunately, the shroud got too hot several times and was deformed. I was afraid that it now had reduced cooling performance. I found an update to the fan shroud that looked very efficient, and somebody analyzed the airflow, and it appeared to be very effective in cooling the filament.