Hi, please help me, i have one room in my house, this is 53 squer meters. i want build two different lighting cycle zone (400w hps 12/12and t8 18/6for clones) my problem is, i have only a door and a tube in the wall wich is ca. 3,5 inches. i cant cut the door but i need to solve the good ventillation. sry for my bad englis, and thank you for your help. i cant find any good idea