Whaaaat Athos, tell me you didn't just sugest he sets up the filter outside!
The filters were engeneered to work thru suction, if he sets it outside he will need to use it the other way around, rendering the filter ineffective, so that was a big NO NO.
You are right about the top air being hotter, you should set the exhaust outside to leave enough room for the filter to sit right at the top (but inside the tent).
Other than that everything is perfect, with this quick change you will have it 100% efficiency!
Good luck growmie, and wish you bushy monter grows.
Stay lit.