What if you built a small (i mean 1ft x 1ft x 1ft) box with a (size of Vent tubing) hole in one side and 5-20 holes on the opposite side (depending on size needed for easy airflow). Stuffed full of (carbon, Dryer sheets, Good smelling shit) and lead a vent tube from your fan to the side of this box and seal the vent tube it to the box. would this cure the problem of smell... and with that train of thought what if you took one of the other 4 sides of this cube and made hinges on it with a small baby latch (some kind of rubber sealer for the small gap around the door) so you could have a quick easy way to change the inserts if they start to fail. build this out of plywood or something strong and theoretically ( if im not just really high and tired) you could have a portable permanent smell blocker... would this work and if so would it be feasible for a PC box...
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With carbon it could work, in essence that is the same thing as a carbon filter. With dryer sheets or "good smelling shit", no it won't work. You need to cleanse the air of the MJ odor, adding a different odor to it just gives your nose two things to notice.