i have some smaller equipment from a smaller setup. Bigger tent now, calls for more cfm. My question is I have a 4" 200cfm can fan, and probably halfway i was thinking of adding a 6" in line booster fan 160cfm, does that mean the cfm is 360? basically for the grow area i need about 300 and change. So if this is true 360CFM would be just a bit more than what i need.