Ender 3 Fan Vent - a beta one?

thingiverse

I optimized airflow by adding chamfers. This might improve air circulation. The angled end openings were adjusted slightly because I suspected that the air wasn't flowing as well under the original nozzle as it could be. On one side, a chamfer was added to minimize material usage during printing. You can adjust the angle at Cut Extrude, known as "Rez".