so am i putting the carbon filter outside the tent instead of inside ? and am i putting the hepa or anti pollen filter in the return of the unit?Vent it into your apt using the carbon filter and put an extra hepa or anti-pollen filter in your a/c-heat vent... That's what I do... never have any problems with smells... good thing to keep potent incense around your apartment too... don't light them just leave them around... they last longer and will kill off any escaping smells.