Grow Room Ventilation Help!

""Can anyone make a diagram for a proper setup? Room is 8x12x8. RDWC 20 Site, 4 scorpion diablos, quest70."" If you can afford this, pay someone to do it right. This request is like going to the dollar store and asking where there bedding section is and expecting a 5 star king bed. These questions are answered freely by people. keep it simple, asking for technical diagrams is outside of the scope of most users on this site, and even if they could do it, why would you trust it with no credentials. Very silly question to me.

P.s really nice grow space, I'm jealous! Happy growing whatever happens.

Photosynthesis by day with optimal vpd plant captures carbon all day. Cellular respiration by night. Vpd 10x less effective, plant creates co2 as by-product all night long. Need to decide how you will add co2 to your grow as there are various methods, I prefer organic method. Requires understanding of root respiration, microorganisms and carbon along with compensation point. Never add co2 at night only daytime after it drops below 1000. If using organic method you will need a negative pressure for oxygen diffusion and preventing co2 buildup in the mediums. No point in using co2 without the matching temps or the metabolic pathways won't keep up. Optimal leaf surface temp for photosynthesis is 86 @ 400ppm. The harder a plant transpires the more it provides endothermic cooling to the leaf. When you push your plants hard transpirationally it makes the leaf upto -5F cooler than ambient. So in order to actually hold optimal lst at 400ppm co2 you would need to hold ambient 91F which if you have never done in a grow tent for 18 hours everyday I guarantee you are not ready for 1200ppm and how much more water needs to move. 1200 is peaking into 98F just to reach optimal. Most plant will wither and die fairly fast without taking at least some measures of active facilitation of antoxidants to assist with photoprotection of the photosynthetic apparatus at such extremes. Honestly would not bother with the co2 until the room has alrdy reached optimal growth parameters and you are comfortable its the only way forward for increase. A good negative pressure setup will increase yields upto 20% which is almost as good as co2 supplementation. 9 cardinal rules of plant growth only once all other 8 environmental metrics are optimized should you ever worry about co2. If any one of the processes run at 30% efficiency then doesn't matter what you do the entire cycle will be limited to that 30% regardless of how much co2 you waste. Learn to walk then run.

I'm just wondering which room is yours or both or what is it your actually asking for.. Look sweet in the white room, I'd get rid of the settee in the other.

Donate waste money on co2 especially if you’re learning to grow. You will just waste money. For a giant room like that you’re gonna need some crazy good air exchange for the room. I would at minimum have a 10inch exhaust fan and filter on 2 sides of the room one pulling air in and one pulling air out of the room. Also with a large room you will need a few box fans blowing in all different directions. Even better than box fans places like grow pros solutions sells air exchangers for lines of plants. They are a fan device hooked to a long tube with holes and it blows air directly to each plant. If your useing your article to grow I would suggest putting some 3 or 4inch foam board along all walls to insulate better. When your grow room gets hot and it’s cold outside if your ceiling is not insulation good like in an attics you will start to have water drip from the ceiling. Honestly I would suggest starting slower than a giant room. Maybe do a run or 2 in a 4x4 or 5x5 so you can comprehend what types of things to look out for. Everything gets way harder when you scale it up

For a sealed CO₂ room, you actually don’t want to exhaust too often, otherwise you’ll just waste your CO₂ and destabilize temps/RH. Here’s the ideal setup: Intake: Passive or filtered intake (only for emergencies or cooling help). Exhaust: Keep it on a thermo-hygro controller let it kick in only if temps exceed your target (e.g. 30 °C / 86 °F). AC + Dehu: Let the portable AC and dehumidifier (Quest70) handle the environment most of the time. Circulation: Add strong oscillating fans at canopy level and under the canopy you want full air movement but no leaf flutter. With that setup, your CO₂ stays stable and your plants stay happy If you want, I can draw you a quick diagram for the airflow layout.