I'm trying to plan my ventilation and odor control for my upcoming fall grow. I'm probally going to go with a DIY carbon scrubber. How big of one should I make? also would it be good to have a duct running from the top of my relfector with an inline fan pulling hot air and stinky air to my carbon scrubber? and is the carbon scrubber better outside the growroom? or is it fine in the closet? any help would be appreciated.