Hello fellow friends: I have a couple questions as I'm in the process of setting up a medical grow. I am going to be utilizing: Seperate Rooms: I will be running Co2 at 1250 ppm. 12x SolisTek 600w HPS w. Ushio bulbs. (in flower room) :: Dimensions 20x20 3x SolisTek 600w MH (in veg) :: Dimensions 10x14 My greatest concern right now is what do I do for cooling? Right now there is no issue with heat as it is winter out, but come summer time I can only imagine the temps when all hoods are running. My options that I've come up with so far: 1. Should I get a heavy duty AC unit and run open hoods? 2. Should I get Raptor 6" Hoods and run vent them? 3. Should I get a Mitsubishi ductless A/C with heat pump for additional heating if needed in winter? My concern with running Hoods is that the Co2 is going to get sucked out via venting. My grow room is completely sealed and sealed with sprayed insulation. If you could please give your opinions, but only if you have 2+ years of experience with a setup this size. I'm not looking for novice growers advice. Thanks!