Southwark Metal 23_24X8 Trunk Duct Collar 24x8 Offset

Product Description

The SOUTHWARK METAL 23_24X8 is a rectangular sheet metal trunk duct collar designed for use as a starting collar and offset takeoff in forced-air HVAC duct systems. Fabricated from hot dip galvanized steel, this fitting provides a durable, corrosion-resistant connection point where a trunk duct originates from an air handler, furnace plenum, or other primary supply duct. The offset body pattern accommodates installations where a straight collar is not practical due to spatial constraints. HVAC sheet metal mechanics and duct fabricators are the primary installers of this fitting. It meets ACCA and SMACNA standards, making it appropriate for both residential and light commercial duct system work.

This collar is suited for rectangular trunk duct systems in residential and light commercial HVAC applications. The 24 x 8 inch size makes it a common choice for main supply trunk runs where moderate airflow capacity is required. The offset configuration is particularly useful in tight mechanical rooms or attic installations where the duct run cannot align directly with the plenum opening. Installers use this fitting to transition from the air-handling equipment to the main trunk line with a properly sized, code-compliant starting point.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in conditioned and unconditioned spaces
• Offset body pattern accommodates installations where straight alignment is not possible
• Starting collar design establishes the trunk duct origin at the plenum or air handler
• Rectangular profile matches standard rectangular trunk duct cross-sections
• Meets ACCA and SMACNA applicable standards for duct system fabrication

Compatibility

Designed as an OEM-style replacement and new-construction fitting for rectangular trunk duct systems in residential and light commercial forced-air HVAC installations.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Power down and lock out the air-handling unit before beginning any duct connection work. Secure the collar to the plenum or trunk using sheet metal screws and seal all joints with UL-listed duct sealant or approved foil tape per SMACNA guidelines. Verify that the offset orientation is correct before fastening, as reversing the fitting after installation requires full removal.

Technical Specifications

• Size: 24 inches x 8 inches
• Body Pattern: Offset
• Type: Starting, Rectangular
• Material: Hot Dip Galvanized Steel
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 23_24X8