Here's the deal guys.
You either go 100% sealed which requires Co2 enrichment and no fans in or out,just within the room to include a carbon filter,you will need an AC and possibly a dehumidifier s well.
Or,you go Co2 enriched with controlled venting which will turn off the Co2 to vent the heat(the only reason to vent in this situation)
lastly you could go traditional with venting continuously to exhaust heat and replace the needed Co2.
A good CF is required in all three rooms.
The wall AC units can leak 5-20%(which can be improved upon)as can the twin tube port.AC units(which is the best for sealed rooms unless a wall unit is possible),Single tube portable AC units are poor choices for sealed rooms because they have only one hot exhaust output which will draw out the Co2.
If a single tube port AC unit is used with Co2 it must be synchronized to run,cool and exhaust the hot condenser air while the Co2 is off.
My new sealed tent (4x8)is inside a room(10x10)using H2o cooled lighting and air cooled as well which draws outside tent air through the lights then pushed into the AC and out the tent in a closed loop.
Co2 burner runs at 1600ppm during the 12 hr lighting period.
This way i have 100% control of the tent inside the room,btw 1600ppm sealed rooms run at 86F. for optimum growing conditions.
Remember*****when using any AC on a timer you must use an analog unit which will turn on and off when power is added and lost through the timer,digital/electronic units will only work on their own while always being under full power.