As I said, I do it in my Vanagon all the time and, last I checked, I'm
not dead. Anyone who will travel, sleep, or play bingo in a sealed
container is just a contaminant in the gene pool.

Rick wrote:
Hey it sounds like we got a volunteer.

I personally know of 2 deaths due to folks breathing N2. Thats pure N2.

And what, pray tell, were these geniuses doing breathing pure N2? I
personally know of 4 individuals who died breathing N2O. They
were...uhm...what was that word? Stupid. Pressurized gas, sealed
environment, stupid. You'll note that in none of the scenarios
presented was anyone exposed to any prolonged exposure to "pure N2". Do
the math, it's not rocket science.

Please, feel free to demonstrate how any reasonable amount of CO2 or N2
can sublime or evaporate into an average size boat, **in the typical
amount of time required**, to result in a dangerous environment. Note
we are *not* talking about something like CO, which preferentially binds
with hemoglobin relative to O2, and thus presents a very real hazard.

Keith Hughes