Thanks to everyone else too. Stinky, I did some more reading on sealed rooms. Not as much as I would have liked to because I was sort of in crisis mode all day dealing with the heat. I've got it sealed up now. I am drawing air for the light from the next rroom and venting it out the window. I run CO2 on a slow leak dispersing it with an oscillating fan during the light cycle. I just got it in last night so I haven't been able to see the results yet. One thing I'm worried about is getting the plants O2 during lights out. I'm wondering if I should run in fresh air or if that would defeat the purpose of the sealed room. If anyone's still on this thread I would love to get your input. Stinkyattic especially so far I have seen nothing but what looks like great advice for her posts. Thanks again everybody.:rastasmoke: