The Sunday Preach CHAPTER 5:
It's Really The Only Time You Have.
"Much of how quickly you deplete your air supply is predicated on your level of comfort in wearing the SCBA ensemble, your physical fitness level, and your mental status." (Pg 39)
In the not so distant past, SCBA cylinders had "work" and "exit" times that were universally accepted for the various cylinder types. Those static numbers are a thing of the past.
While there are certainly unofficial 'rules of thumb' to calculate a members or a companies air usage, the only way to truly know, is to time yourself or your team is to get them on AIR! Using your SCBA, completing firefighting functions and document the results. You may be surprised with the results...
The SCBA is perhaps one of the most important pieces of firefighting equipment that we utilize. You can be the best trained, most fit, and toughest firefighter on your team... but in an IDLH with a SCBA failure, you are a nothing more than a civilian in an expensive firefighters costume... a MAYDAY, and a liability for the team.
YOU MUST BE AS COMFORTABLE IN YOUR FIREFIGHTING SCBA ENSEMBLE AS YOU ARE IN YOUR OWN SKIN!