Why?.... Typically oxy cons put out 94% to 98% oxygen.... The 94% may indicate unit is near end of life cycle and may need to have sieve beds replaced... Remember too, if you lower LPM kaybe4 oxygen content may go up some...It may be putting out 96% oxygen at 4 LPM, then maybe not...
You can lead a person to knowledge, but you can't make them think.