The chance of sending your fragrant pot odor out of your home and to wherever is not one I'd like to take.
A standard exhaust setup includes a simple carbon filter and a high-CFM blower to force air through it. You can then blow it out of your home through a vent with a dryer vent cover on it, that looks like a dryer vent- or blow it into the line that your clothes dryer already uses and take advantage of the existing dryer vent.

Carbon filtration is important no matter what route you take, unless you live in a windy and secluded area, and even then there is an argument to be made FOR filtration.