I am going to have a closet grow. I have a my own place finally! and i am growing northern light and swazi redbeard in one sitting. My single only concern is the smell, i actually like the smell but i don't need anyone knowing im growing: certain peeps, family, etc... Also my office had the unused closet. I will add a exhaust fan venting into the attic, an air purifier, and a couple of fans. I will grow no more than 5 plants at a time. Does this setup sound smell proof?
The closet should work. Venting into the attic is a good idea. Instead of an air puirfier I would recomment a carbon filter attached to your exhaust. If all of the air in your grow room vents through your filter, the smell will be gone.