This is my first grow room. It is set up in my laundry room upstairs. It is a 2 x 2 flood table using sure to grow grow medium in some and a drip system from a 25 gallon resevior. As of now, I am only using 12.5 gallons of it, as I am only doing two plants for now. I am going to use GH hard water nutrients. The light is a 400 watt xtrasun hood with a switchable ballast. I want to verify one thing before my concerns, the guy at the hydro store said to run the drip pump for 5 min every 3 hours or so. Is this correct? I am in Las Vegas and it is very dry here. My concerns: 1) Heat. It got to 93 in the room during the day with the light on. I can't really get it any cooler than this without sucking in house air, which is part of my second concern. And, if I do, it will pull in air from outside into my house and it hits 115 in the summer. Should I use CO2? I have been told the plants are good up to 96 degrees with Co2. 2) Odor. This being in my laundry room. I don't really want to have all my clothes smelling. I have looked around and come to the conclusion that a recirculating inline fan hooked up to a carbon filter should eliminate the odor. How big of a fan would I need? The room is 6 x 8 x 8. I want to make sure there is no odor in my clothes or the house. I really want to get my room up and running but I am running out of money. (Trying to save for a vacation we have planned.) So, please keep that in mind with your suggestions. Thanks for all your help in the past as a lurker and thanks in advance for future advice.