Discharge 15 : The final portion of a duct or pipe where the product being conveyed is emptied or released from confinement; the termination point of the pipe or duct
NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, 2008 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=96, (Std: Vent Control and Fr Prac of Comm Cooking Opr - Amer) {240 NFC}