I only use outtake-fans, they will automatically pull the air in. Intake and outtake imo is not worth unless you want to controll a area by the size of a whole room. Put Your outtake up high in the tent and intake spots very low and you will have perfect airflow. You can also test it, just put your outtake on highest level and compare its airflow-pressure on the outtake and intake spots, will be same.