I'm going to try to grow in my attic but I have a few problems I need to sort out. Will it be possible to grow 5-10 plants under a 400w HPS without intaking air conditioning from the house. Instead I would intake and exhaust out of the roof with I'm thinking 2 vortex fans. I know that this won't bring in cool air in the middle of summer but will create enough air circulation to keep the grow room the same temp as outside? I also have the choice to intake air from a vent/window area if that would also help. Also how should I go about setting up the grow box? I plan on sectioning off a room in the attic about 10ft by 20ft. Would it be best to just grow the plants in that open space so there is more air flow? Smell will be an issue so do you reccomend buying a carbon scrubber or making one?