And how long would it take to run out of oxygen?
I often wonder if there's a tiny little gap of say, 1 square cm to the outside world, would you rate of oxygen consumption beat the inflow of oxygen?
I have a stupid question to ask you all.
Let's just say that you shut your door, and then shut all your windows so there isn't any ventilation and stayed in your room for several days. Could you end up breathing until you've reduced the oxygen to dangerous levels?