Southwark Metal 23_26X8 Trunk Duct Collar 26x8 Offset

Product Description

The SOUTHWARK METAL 23_26X8 is a sheet metal trunk duct collar takeoff designed for rectangular duct distribution systems in forced-air HVAC installations. Manufactured from hot dip galvanized steel, this offset starting collar connects a main trunk duct to a branch run or starting point in the duct system. The 26-inch by 8-inch footprint suits common residential and light commercial trunk-and-branch layouts. HVAC sheet metal mechanics and duct installers use this fitting where an offset geometry is required to transition airflow out of the trunk. Its galvanized construction resists corrosion in unconditioned spaces such as attics, crawlspaces, and mechanical rooms.

This collar is suited for rectangular trunk duct systems in residential and light commercial forced-air heating and cooling applications. The offset body pattern accommodates installations where a straight takeoff is not feasible due to structural or spatial constraints. It functions as a starting collar, meaning it is typically installed at the beginning of a duct branch or at the plenum-to-trunk transition. Fabricated to ACCA and SMACNA standards, it fits within system designs that follow Manual D duct layout practices and SMACNA duct construction guidelines.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in unconditioned spaces
• Offset body pattern accommodates installations with spatial or structural constraints
• Starting collar design for trunk duct branch or plenum transition connections
• 26-inch by 8-inch rectangular sizing fits common trunk duct configurations
• Fabricated to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement and new-construction fitting for rectangular sheet metal trunk duct systems requiring a 26-inch by 8-inch offset starting collar.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic in accordance with SMACNA duct construction standards and local mechanical codes. Power down the air handling unit and confirm the system is de-energized before cutting into or modifying existing ductwork. Seal all joints with UL 181-listed duct sealant or approved foil tape to meet code requirements and minimize air leakage. Proper support and hangers should be applied per SMACNA guidelines for the duct size and weight.

Technical Specifications

• Size: 26 inches Length x 8 inches Width
• Material: Hot Dip Galvanized Steel
• Body Pattern: Offset
• Type: Starting, Rectangular
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 23_26X8