Air Management

1. Air Management By Matt VanGiesen Captain, NWFR

2. When do we need SCBA? • Contaminated atmosphere or one that may become contaminated • Oxygen deficient, suspected or possible • Where do we wear SCBA? • Active fire area • Potential explosive area • HAZMAT • Confined space • IDLH: Immediately Dangerous to Life and Health

6. Why do we need to manage our air? In March of 2001, Phoenix FD conducted extensive studies and found that 30 min. cylinders typically last only 16.5-18.5 min. When your low pressure alarm goes off, do you have enough air to remove yourself from the IDLH environment? We wear SCBA to protect ourselves from IDLH hazards going in, we need to make sure we have enough air to get out.

7. Air Management: An ongoing assessment of air consumption by individual firefighters and/or teams who are breathing air from their Self Contained Breathing Apparatus (SCBA). • ROAM: Rule Of Air Management- Know how much air you have used, and manage the air remaining so that you leave the IDLH area before your SCBA low-pressure alarm sounds. • 1993-2006 86 FF died from asphyxiation in buildings • 1993-1997 asphyxiation was the leading cause of severe injury

8. AIR MANAGEMENT IS: Knowing your personal limitations. Knowing your Air Consumption Rate. Knowing the limitations of your SCBA. Bottom line: Having enough air to compensate for unplanned events that may prevent you from leaving an IDLH environment.

9. What are unplanned events? • Disorientation • Entanglement • Overexertion • Overextending operations • They all lead to • TROUBLE RIT fact: 8-9 min. to locate FF 22 min. to remove FF Location and removal time is longer than most of can last on a single cylinder!

10. Facts and Figures • Our SCBA: • 30min. Cylinder or 2,216 PSI which = 45 cu. Ft. • 30min. is based on the average consumption rate of an adult male, which is 24 breaths per minute for a consumption of 40 liters per minute. Since 45 cubic feet of air is equal to 1,270 liters, the cylinder is rated at 30 minutes. (1,270L divided by 40L). NOTE: NFPA requires regulators to output a minimum of 103L/min.

11. Let’s have some fun………… . . . Who has the best ACR? • To keep things easy for us firefighter types, we compute our Air Consumption Rate in PSI per minute. Here is how we do it: • 1. Note the start pressure of the SCBA cylinder. • 2. Perform an activity of sorts breathing from the SCBA for a timed duration of 10 minutes. • 3. Note the ending pressure. 4. Subtract the ending PSI from the start PSI. 5. Divide the difference by 10 and you now have your ACR.

12. Need an example? • Start PSI 2,200 • End PSI 1,100 • Difference 1,100 PSI • Divide by 10 min. • Equals 110 PSI/MIN ACR • 2,200 PSI bottle, divided by 110 PSI/MIN ACR equals 20 minutes of air.

13. Let’s try it!

14. 10 minute Activity Be ready to report back in ten minutes

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