exhaust systems

hey guys. i pretty much got my grow down, or atleast the plan, but i was wandering what i can do for an exhaust? do i defintely need an exhaust? what i dont understand is: if i have a grow box in my closet, where would the exhaust lead to? an exhaust means something needs to be removed from the environment, but what good is removing the stagnant air from the box and putting it in my closet? can someone explain the basic concept of an exhaust? thanks aot

 

you need two things in your grow box that an exhaust can help provide. you need some air movement inside so the atmosphere's not stagnant. stagnant air will increase chances of mold and fungi. second you need fresh CO2 and oxygen for your plant. stick it in a closet without airflow and it's just going to suffocate/suffer. find a way to draw in fresh air from outside your closet, exhaust it inside and it should be all good.