Did you guys know that if you sealed yourself in a 12x12 room, it would take 8 years to use up all the oxygen in that space via breathing?
Not saying it would be comfortable.
Nvm. The CO2 would kill you much faster (in about a week). Maybe brings some plants and grow lights.
12ftx12ft. My broscience kekulations were off by a lot. But even a week is not bad.