Well I am kind of getting ahead of myself, I can tell myself. I had originally planned on putting poly film up but after spending so much money on lighting, dehumidifier, ph meter, and alot of stuff I didn't know I needed when I started it well I kind of started running short on money. I set out looking for poly film this morning at lowes, garden place, and Home Depot but when I couldn't buy it I bought some flat white paint with sum fungicide. And the room is prolly bout 12x12. And I was only expermiting with the co2 grill thing. I have ventilation coming in but none going out yet. I plan on it but gotta wait till next payday. I'm still managing keeping the temp around 72/75 degrees.