Hey fellas, I need some major input on the room I built. My co2 is being depleted quickly and the pressure in my room is way to much. What I did was install two 14000 BTU portable AC (Whynter 14,000 BTU Dual Hose Portable) Mini-Split wouldn't work for this location. but I placed both units outside of my grow room. I cut the dry wall where the units blow and with metal made a sealed enclosure so the units blow inside the room. The ac isn't blowing any air from inside out. The room it self is totally sealed. I sealed the first room then built a room around it with 2x4s and sealed that also. The room is 14x12x8 I have 16 plants inside under 5000 watts in RDWC the chillers are outside of the room. I'm using co2 tanks, I set my co2 for on 6 CFH for 20 mins on and 45 mins off and the co2 gets depleted in about 10 mins, it also doesn't get up to 1500ppm only to about 900. I spent a lot money and time rebuilding this room and this is driving me crazy!!! Please help me fellas!!