Ender 3 EZ Vent Upgrade (Uses Stock Fan)

thingiverse

This upgraded vent nozzle for the Ender 3 boasts high volume, dual opposed crossing flow capabilities. This unique flow type generates maximum turbulence, targeted directly at the nozzle to rapidly cool the filament and marks a significant upgrade over the stock air diverter. I intentionally designed this upgrade to enable effortless printing without supports. However, some challenging bridging can occur on top of the duct, so it's recommended to print one vent first and then install it before printing a second one. Small features will print best at 0.1mm, but I've successfully printed it at 0.2mm in under an hour. This vent keeps plastic far enough away from the hot end to prevent melting or warpage issues that plague some other upgraded fan vents. It directs air below the hot end directly at the filament for maximum cooling efficiency. The dual nozzle design ensures your parts cool evenly from all sides. To install the vent, remove the 4 fan screws and slide it behind the fan. Use the same hardware to complete the installation. Be sure to use the longer 2 screws in the bottom hole locations. You may need to loosen the 2 screws holding the metal fan frame to ensure the bottom of the vent is parallel with the build plate. It's possible that the vent may rattle against the metal frame. To prevent this, adjust the vent slightly downward by loosening the fan screws or place a small piece of electrical tape on the far side of the vent where it contacts the metal frame.