header duct
header duct
A main duct or feeder duct for bringing electrical cable from a service closet to distribution ducts.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive
Cooled air is distributed by two main
header ducts. One is positioned directly over a walkway, while the other runs down the middle, The first duct circulates air from a series of grills blowing directly downwards.
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