yeah but you really only need an inline duct fan i run 2 600watts and my 6" inline duct fan works well enough to keep them cool and it exhausts outside, plus if you keep your carbon filter just re-circulating the air in the room and not exhausting it will give you the option of using c.0.2 down the road without wasting too much of it. I also went with an a/c that exhausts the hot air out of the room, a temp sensitive atmospheric controller is a must for both a/c and c.o.2. good luck working out the kinks took me a few weeks too. lol A/C i got is the "YETI" model from H.T.G. wich i think stands for high tec growing supply