I assume the 44k PPM CO2 exhaled air is the product of respiration (I.e. the lungs have processed it), whereas the air used in mouth-to-mouth is quickly inhaled and exhaled.
As the respirator still has to breathe regularly, there will be still a significantly higher CO2 in the air for respiration. I’d guess maybe half − 20k PPM. Interesting to see somebody measure that.
Ah, very related: Exhaled air contains 44000 PPM CO2 and is used for Mouth-to-mouth resuscitation without problems.
I assume the 44k PPM CO2 exhaled air is the product of respiration (I.e. the lungs have processed it), whereas the air used in mouth-to-mouth is quickly inhaled and exhaled.
As the respirator still has to breathe regularly, there will be still a significantly higher CO2 in the air for respiration. I’d guess maybe half − 20k PPM. Interesting to see somebody measure that.