He is saying he does what you are asking about: he uses the filter and a fan in a room to recirculate and scrub (deodorize) the air without it exhausting.
gainesvillegreen Reviewed by gainesvillegreen on . Can a carbon filter work in this way? In an open area in my room that me and my dad are setting up for me to grow, can i just have a carbon filter hanging with a fan blowing into it for it to completely remove odour as it would in a box or closet? Help Much Appreciated:thumbsup::jointsmile: Rating: 5