Co2 Need Help

I have a 5x10 room sealed I'm trying to set up a CGE I have everything set up all sealed I was trying to go with the no in or out vent but my ac exhaust air all the time the fan never turns off is it even going to be worth it to use co2 or is it all just going to get sucked out

What type of a/c are you useing, a/c usally recycles cool air rather than suck` in warm air and then cool it.

It's a portable LG from home depot 9000 btu

U won't be using CO2 at night. Turn on evacuation fans then. Or put burner on timer like 3hrs on 1hr off and run the evac fans then
I just let my burner run all 12 hrs and the 8"can fan to remove all air overnight.

Check out this thread! https://www.rollitup.org/indoor-growing/425867-portable-ac-users-i-need.html

Anybody have a CGE set up if so do u have problems with powder mildew I have a dehumidifier and it keeps it at 44% at night and I'm also using been oil should I be good