what you do with this is , you get some aluminum ducting and connect it outside from you exhaust fans to one end of the carbon scrubber , thus the fan is blowing through the vent into the carbon and out smelling clean.
you need to have exhaust fan blwoing the air out , and no other escape routes for smelly air .
i also found some carbon cloth at a pet store so i taped that over the end as well , can never have enough carbon lol.