Also tanked oxygen has a much, much higher purity (often 99.5%) than oxygen concentrators which can range from 89% to 96% at best.
And if you set the output on a concentrator to its highest output even the newest ones will go from 96% down to 87%.
The best bet is to set them for at least a half liter less than maximum.
That would 4.5 LPM on a 5 liter machine and 9 liters works better than 9.5 liters on a 10 LPM machine.
The human body won't notice it in a medical situation but your flame chemistry will scream like a wounded animal.
Good Luck with this. It's a relearning experience once you get spoiled using tanked O2.
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The Zombie Apocalypse is Upon Us.
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