Airflow question.

[Swegrow]

Is it necessary to have a fan to move air into the grow space or is the air out fan enough to drag air in? space is 5x4, 7+ feet tall

 

[Nugg]

Not sure and don't care if correct..but I just suck out of each room from my control room.. probably wouldn't work good for a tent..

 

[Anthem]

Is it necessary to have a fan to move air into the grow space or is the air out fan enough to drag air in? space is 5x4, 7+ feet tall

Are you in a tent?
The intake if it is free flow has to be like 2 1/2 times the flow of the exhaust to NOT create a vacuum in the grow area.

 

[Swegrow]

Are you in a tent?
The intake if it is free flow has to be like 2 1/2 times the flow of the exhaust to NOT create a vacuum in the grow area.

No, im rebuilding a closet (picture in my signature link)