Quote: (Originally Posted by
jaap)

Don't know about divers. But there is plenty of data in the litterature about sleeping or uncounsious adults. A quick search seems to yield some thing like 0.2-0.3 lpm which sounds reasonable.
Some rough couch experimenting I did breathing a small loop O2-Rebreather tuning the O2-flow yielded about 0.4 lpm O2 for me relaxing in a couch watching TV.
Humm, watching TV, does that assume the brain is completely non functional?