Thanks so much for the head's up. That leads me to my next question...

If I am doing an active and passive intake system with computer fans, do I put the odor control there? How does that work? Do I use a carbon filter on the air that's going out? Also, can I just filter it into the room and it won't smell, or do I need to run some elaborate vent system into my attic or outside? I guess I am asking more so how effective the filters are. Thanks.