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The SOUTHWARK METAL 73C101614 is a square to round transition outlet used in sheet metal ductwork systems to connect a rectangular plenum or boot opening to a round duct collar. It measures 16 inches wide by 10 inches in length by 12 inches in height and weighs 2 pounds. This fitting is a standard component in forced-air HVAC distribution systems where the supply or return air path shifts from a rectangular configuration to a round duct run. HVAC sheet metal installers and duct fabricators use this transition during new construction rough-ins and duct modification work.
This transition outlet is suited for residential and light commercial forced-air systems where a rectangular starting collar or plenum tap needs to feed into a round trunk or branch duct. It is commonly installed at the air handler, furnace, or fan coil outlet, or at any point in the duct system requiring a geometry change. The 16 by 10 inch rectangular opening and the corresponding round outlet make it a practical fitting for standard residential duct layouts.
Designed as an OEM-style sheet metal fitting for use in residential and light commercial forced-air duct systems requiring a square or rectangular to round transition at a 16 x 10 inch opening.
Installation is performed by licensed HVAC technicians or qualified sheet metal workers following applicable mechanical codes. Shut down the air handler or furnace and de-energize the system before beginning ductwork modifications. Secure the fitting with sheet metal screws and seal all joints with UL 181-rated mastic or foil tape to maintain system static pressure and air quality. Avoid over-crimping the collar, which can restrict airflow and reduce system efficiency.
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