What is the maximum acceptable concentration of carbon dioxide in the compressed air used in SCBA?

The maximum acceptable concentration of carbon dioxide in the compressed air used in a Self-Contained Breathing Apparatus (SCBA) is 0.04%. This level is established to ensure the safety and effectiveness of the breathing apparatus, as higher concentrations of carbon dioxide can lead to adverse health effects such as increased respiratory rate, headaches, dizziness, and confusion. Maintaining air quality within specified limits is crucial for the protection of the user in hazardous environments.

In the context of SCBA usage, keeping the carbon dioxide concentration at or below 0.04% helps to ensure that the air being breathed is safe, allowing firefighters and other emergency personnel to perform their duties effectively without being hindered by potential health complications from inhaling CO2.