Quote Originally Posted by CoffeeCup View Post
... I built the enclosure because I was having warping and layer adhesion issues on a large about 6" x 6" build...
...The fan on the hot end fan is blowing from the front towards the back
I interpret this to mean the fan is "pushing" air onto the hot end heatsink, which would be consistent with what MakerFarm and e3d both tell you to do. The boxed-in bottom of the i3/i3v X-carriage leaves nowhere for the fan airflow to go except back down onto the print. For ABS, that has led to warping/adhesion problems for at least some people. Flipping the fan around so it pulls air up from the print area, through the heatsink, and exhausting it out the fan helps.