I would think that what the intake situation on one tent versus the other looks like could throw things out of balance with shared ducting. You're creating negative pressure in each tent. Depending on the setup, if one tent has significantly less resistance on where the replacement air will get sucked in, then that tent will see much higher airflow than the other as it will be the path of least resistance. If each tent has it's own fan, the exhaust doesn't have a choice of which tent to pull from. Dunno that it would make a large difference, just something to maybe keep in mind. :smoking: