quick question! So my grow room is in my secound living room, inside like a little closet part where the washer and dryer go. I have to fans running on my one plant in flower. Now, during the day when lights are on, i leave it open the rest of the room. it dont have doors so i black out the opening with black plastic sheet. But my problem is i really dont have no type of ventilation besides the fans running. During the day when lights are running i leave it open to the rest of the room which keeps the grow space at normal rh. If i close it with the lights running the humidity gets high so i always try to keep it open when lights are on. now my concern is during the night with it being closed the entire time, is the plant breathing in enough o2 and if this set up hurts yield. However it is a opening to outside where the dryer duck vent go but i dont have no ducking so i sealed it of with tap and one of my fans is infront of a pipe opening, trying to bring fresh air up from the ground if it is even possible at all dont know if its probably helping just hoping.