Transition Zone 5 : The layer between the smoke layer interface and the first indication of smoke in which the smoke layer temperature decreases to ambient
NFPA 92B Standard for Smoke Management Systems in Malls, Atria, and Large Spaces, 2009 ed. http://catalog.nfpa.org/NFPA-92B-Standard-for-Smok e-Management-Systems-in-Malls-Atria-and-Large-Spac es-Prior-Years-P4285.aspx, (Std: Smoke Mgt Sys in Malls, Atria, and Large Spaces - Amer) {239 NFC}
