Air Flow 2 : The movement of air within a building; it is especially important on the fire floor, when air flow often follows a fire fighter's advance towards the fire; for purposes of ventilation, it is usually measured in cubic ft/min
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}