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Typically, Single Branches taper as the new line enters the main line. This is because the new line is bringing in more air. The exiting part of the branch (toward the fan) is therefore bigger to accommodate the increase in air. The new line typically enters at 30 or 45 degree so as to 'merge' into the air flow.
Unit of Measure

Specifications

Medium

Air

Diameter

15 in

Angle

30 º45 º90 º

Material Thickness

18 gauge

Materials

Available in Galvanized or SS

Finish

Galvanized

Additional Information

Additional Information

Known as branches, pants, and/or wye-branches, they all provide a 'leg' coming off the main line. All our branches are available in all three connection types, whether it be rolled lip, flange, or tubing.

All Duct branches are 18 gauge or heavier. This enables us to weld the branching part to the trunk and insure a very tight seal.