How will it blow the air out otherwise?
At present, I have the fan (inside a box) on top of the wardrobe. The filter is inside the tent. The fan sucks the air from the tent.
If the filter is outside the tent, then the fan will have to be inside the tent, yes? Otherwise how can the air get to the filter?
I can't have acoustic ducting dangling into the tent, then the fan and filter outside the tent. Too much of a risk with the fibreglass contaminating the weed if any falls.