Also, good luck with the whole Co2 gig. I gave up on Co2 a long while back. With enough fresh air circulation, I have yet to see much of a difference between the two methods myself. And yes, I used Co2 for many years. Like you, I got tired of filling tanks, and having to deal with the heat issues of a sealed room. With a sealed room, you need to cool not just the lights, but the room itself. In the end, TO ME, it wasn't worth the extra money I spent on additional electricity, running ducting, Co2 tank refills, humidity fluctuations, etc. Hope it all works out for you man, good luck.