One thing that you might consider.....If there is space between the bottom of the door and the floor, then you could mock up some kind of cardboard box with a space cutout that corresponds to the space under the door....and then cut out a hole on the top of that box, connect the duct from the tent to it and divert the air out the bottom of the door via the slot that you cut out. It would be kind of like a manifold. Of course, the space might not be big enough to handle the capacity of the exhaust rate, but it might be okay with the fan slowed down a bit....just a wild card idea.