3 ms·
Breathed air is diluted right, to some lower % of oxygen content, but it needs to be in the calculation.
by kzrdude 5y ago
Breathed air is diluted right, to some lower % of oxygen content, but it needs to be in the calculation.
- urban_winter 5y agoExhaled air is about 17% oxygen, 4% carbon dioxide. So, as previous poster noted, scrubbing the CO2 is your first priority. You can't breathe air with greater than about 4% CO2 indefinitely. Oxygen levels lower than 15% are also bad. Diving rebreathers are an interesting implementation of these rules in that they are lethal if you get it wrong.