A round duct branch connects to a round duct main using a smooth one-point-five diameter forty-five degree elbow unless otherwise noted. A maximum angle of forty-five degrees is maintained for the branch alignment. Air flow direction indicators guide the transition through the taper and into the main ductwork.
ROUND DUCT SMOOTH 1.5 D 45° ELBOW (UNLESS OTHERWISE NOTED) ROUND DUCTWORK BRANCH ROUND DUCT MAIN AIR FLOW 45° MAX AIR FLOW AIR FLOW TAPER
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