Southwark Metal 23_10X8 Trunk Duct Collar 10x8 Offset

Product Description

The SOUTHWARK METAL 23_10X8 is an offset starting collar designed for sheet metal trunk duct takeoff applications in forced-air HVAC systems. Fabricated from hot dip galvanized steel, this collar provides a durable, corrosion-resistant connection point where branch duct runs originate from a main trunk. It measures 10 inches by 8 inches and features an offset body pattern that allows installers to transition from the trunk to a branch run where clearances are tight or alignment is offset from center. HVAC sheet metal mechanics and duct fabricators are the primary installers of this fitting.

This collar is used in residential and light commercial duct systems as a starting fitting at the trunk line. The offset configuration suits installations where the branch duct cannot align flush with the trunk face, such as in tight mechanical rooms, finished basements, or crawlspace duct runs. It is fabricated to ACCA and SMACNA standards, making it appropriate for systems designed and installed to those widely recognized duct construction and performance guidelines.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in conditioned and unconditioned spaces
• Offset body pattern accommodates branch runs that cannot center-align with the trunk
• Starting collar design establishes the takeoff point at the trunk duct
• 10 inch by 8 inch size fits standard trunk duct openings of that dimension
• Fabricated to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style sheet metal fitting for use with rectangular trunk duct systems in residential and light commercial forced-air HVAC installations built to ACCA and SMACNA duct construction standards.

Installation Notes

This fitting is installed by licensed HVAC mechanics or qualified sheet metal workers as part of a duct fabrication and installation project. Power down the air handling unit and verify the system is de-energized before cutting into or modifying any trunk duct. Fasten and seal the collar to the trunk opening per SMACNA guidelines, using appropriate sheet metal screws and duct sealant or mastic to maintain system pressure class. Follow local mechanical codes and ACCA Manual D requirements for branch takeoff sizing and placement.

Technical Specifications

• Size: 10 inches x 8 inches
• Material: Hot Dip Galvanized Steel
• Body Pattern: Offset
• Type: Starting
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 23_10X8