Alright, So I built a 10x10 room. I split this room into 2 5x10 rooms, one for veg and one for flower. Now, I need a little advice on how I should vent it. I am planning on putting a 6in inline fan and carbon filter (425 cfm) in the flower room that will also be attached to 3 600 watt cool tubes and be vented outside. I am not sure how to vent air into the room. I am leaning toward getting a 4in inline fan and pulling air from outside when its cooler (<75 degrees) and into the veg room. And when its warmer just pull air from the house. Then I will cut some holes into the panda film that divides the 2 rooms so that air can pass between the rooms. Please feel free to add your 2 cents because any advice would be beneficial. Thanks!