This standard applies to commercial passenger aircarrier
aircraft carrying 20 or more passengers and certified
under Title 14 CFR Part 25.1
This standard considers chemical, physical, and biological
contaminants as well as moisture, temperature, pressure,
and other factors that may affect air quality.
Because this standard cannot take into account every
variable, especially those relating to safe operation of the aircraft, the diversity of sources and types of contaminants in aircraft cabin air, and the range of susceptibility in the population, compliance with this standard will not necessarily ensure acceptable aircraft cabin air quality for everyone.