Ken dog i would like you to know i really appreciate your time and expertise bro. Sooooo, it is possible for me to bring in fresh air to circulate within the system for the evaporator, condenser or whatever the function may be. Now.... having said that would it be more adviceable to just let the suction part recirculate the actual air in the grow room and exhaust out a window or actually even a chimney. There is a filter of some sort in the front grill where the intakefan is. Ok, guys thank you all for your patience, shit i feel like this fuckin question is going on forever. Ok look, im going to leave the intake UNducted pulling in air from the growroom then on the exhaust side im going to mount the filter scrubberbefore the flange