Ventilation Question!

i have a realy small place and using exhaust that is quite strong and i used to have a fan inside the closet now i took it away and put it to move air inside in the intake ventilation pipe !

so i don't have a fan inside but the air is constainlty moving all the time there and changes all the time is it enoughe or i should must put also inside one ????

thx all viewrs

As long as all the stems are thick, strong and healthy it isnt essential. But using a fan will make a stronger plant; to hold the crazy amounts of weight when you flower.