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The SOUTHWARK METAL 23_26X10 is a sheet metal trunk duct collar takeoff designed for rectangular duct system installations in residential and light commercial HVAC applications. Constructed from hot dip galvanized steel, this offset starting collar provides a durable, corrosion-resistant connection point where branch takeoffs originate from a main trunk duct. Measuring 26 inches in length by 10 inches in width, it is sized for common trunk configurations and built to meet ACCA and SMACNA standards. Sheet metal fabricators and HVAC installers use this collar to establish clean, secure duct-to-trunk transitions in forced-air systems.
This collar is suited for use in forced-air distribution systems where a rectangular starting collar is needed at the trunk duct. The offset body pattern accommodates installations where the branch must depart at an angle from the main duct face, making it useful in tight mechanical spaces or when routing around structural obstructions. It is typically installed during new construction duct fabrication or duct system retrofits by licensed HVAC contractors and sheet metal mechanics.
Designed as an OEM-style sheet metal trunk duct starting collar for rectangular forced-air duct systems requiring a 26 inch by 10 inch offset takeoff fitting.
Installation should be performed by a licensed HVAC contractor or certified sheet metal mechanic in accordance with SMACNA duct construction standards and local mechanical codes. Shut down and de-energize the air handling system before beginning duct work. Secure the collar to the trunk duct using appropriate sheet metal screws and seal all joints with listed duct sealant or metal tape per applicable code. Do not over-drive fasteners into the galvanized material, as this can compromise the corrosion-resistant coating at connection points.
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