Calculating Oxygen and Air Flow If the Total Flow and Percent Oxygen Are Specified

Parameters:

(1) total flow in L per minute

(2) percent oxygen to deliver (from 21 to 100)

oxygen flow in L/min =

= (total flow in L/min) * ((percent oxygen) - 21) / 79

where:

• 79 = 100 - 21 (percent oxygen in oxygen supply, less oxygen in air)

air flow in L/min =

= (total flow) - (oxygen flow)