UPDATE (2/24/2016): I HAVE CREATED AN UPDATED VERSION OF THESE VENTS WHICH WORK BETTER FOR COOLING : http://www.thingiverse.com/thing:1161628I've been wanting to design this for awhile, but I haven't had the time. I spent the last day designing and redesigning a cooling duct for my printer. I finally came to a good version. The first one I printed was used and tested on the second one. I am definitely seeing better quality already, just from that one print. I'm extremely satisfied with the quality of it, especially since it was printed with minimal support material. UPDATE 6/4/2015: I have changed the cooling area around the nozzle so it has more spread and cools in more than one direction. UPDATE 8/2/2015: I made a few minor changes to make the print easier. There is a chamfer on the first edge which it prints on so it sticks better. Also there is a wider area towards to center so there is more flow directed at the nozzle tip. (clear version is the newest)