An operating environment in which the air surrounding a power system has sufficient mass and flow to prevent heat regeneration and subsequent thermal runaway because of the heat dissipated by the power modules
The air outside buildings and structures It does not refer to indoor air, to air in the workplace, or to contaminated air as it is discharged from a source
is the air occurring at a particular time and place outside of structures Often used interchangeably with outdoor air
The surrounding atmosphere, usually the outside air, as it exists around people, plants, and structures It is not the air in the immediate proximity to emission sources