Southwark Metal 1100148 Rectangular Starting Trunk Duct Collar

Product Description

The SOUTHWARK METAL 1100148 is a rectangular starting collar designed for sheet metal trunk duct systems in forced-air HVAC installations. Fabricated from hot-dip galvanized steel, this straight-pattern collar provides a secure, corrosion-resistant connection point where branch runs or supply boots originate from a main trunk duct. At 14 inches x 8 inches, it fits standard rectangular trunk sections and is intended for installation by licensed HVAC technicians and sheet metal fabricators working on residential and light commercial duct systems.

This collar is suited for new construction and retrofit applications where a trunk duct requires a starting connection point for supply air distribution. The straight body pattern simplifies alignment during duct assembly. It conforms to ACCA, SMACNA, and NATE applicable standards, making it appropriate for systems designed and installed to industry-recognized ductwork specifications.

Key Features

• Hot-dip galvanized steel construction for corrosion resistance in both conditioned and unconditioned spaces
• Straight body pattern for straightforward alignment and connection to rectangular trunk duct
• 14 inches x 8 inches starting size for compatibility with standard rectangular trunk sections
• Meets ACCA, SMACNA, and NATE applicable standards
• Rectangular profile matches common trunk duct geometry in residential and light commercial forced-air systems

Compatibility

Designed as an OEM-style sheet metal component for rectangular trunk duct systems installed in accordance with SMACNA and ACCA ductwork standards.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors familiar with SMACNA duct construction standards. Power down the air handling equipment and verify the system is de-energized before working on any duct connections. Secure the collar to the trunk duct using sheet metal screws and seal all joints with listed duct sealant or mastic per local mechanical code requirements. Follow ACCA Manual D airflow design guidelines to confirm proper sizing before installation.

Technical Specifications

• Size: 14 inches x 8 inches
• Type: Rectangular, Starting
• Body Pattern: Straight
• Material: Hot-Dip Galvanized Steel
• Applicable Standards: ACCA, SMACNA, NATE

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 1100148