Calculating SAC and RMV
- Surface Air Consumption (SAC): The amount of gas you breathe in one minute at the surface in terms of pressure (psi). SAC can be expressed as pressure (psi) or volume (cu ft).
- Respiratory Minute Volume (RMV): The amount of gas you breathe in one minute at the surface in terms of volume (cu ft).
- Resting SAC: The rate at which you breathe when relaxed.
- Working SAC: The rate at which you breathe when stressed.