Yea I couldn't figure out what was going on my first turn, I was trimming, but couldn't think straight, getting sleepy and very short tempered...finally got up and looked at the controller and nearly fainted, it was registering over 4000ppm of CO2. The CO2 stops 30 mins before lights off and starts 30 mins after lights on, so I figured out that 3 hours before lights on I could work till lights on and it would get the ppm's into the low 2000's and I wouldn't get sick. So yea 3 hour max in the Bunker or you will start feeling it, 4 and your pushing it
are you saying that you're exhaling raised the maintained 1200ppm in there to 4000?
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