You dont need to vent a carbon scrubber! It would be much wiser to build one and get a cheap inline fan from homedepot. You can just sit the scrubber in the room and it will clean the air for you:thumbsup: no need to vent unless heat is an issue. When i stopped growing i put my scrubber and fan in my bedroom so i could smoke inside during the winter with the window closed, worked like a charm!