Southwark Metal 20_24X12 Trunk Duct Collar 24x12 in

Product Description

The SOUTHWARK METAL 20_24X12 is a straight rectangular starting collar designed for sheet metal trunk duct systems in forced-air HVAC installations. Fabricated from hot dip galvanized steel, this trunk duct collar provides a secure, square transition point where branch ducts or trunk extensions originate from a main duct run. At 24 inches in length by 12 inches in width, it fits standard rectangular trunk configurations and is sized for residential and light commercial ductwork layouts. HVAC sheet metal mechanics and duct fabricators rely on this type of collar to maintain airflow integrity and structural consistency throughout a ducted system.

This starting collar is intended for use in rectangular trunk duct systems where a straight takeoff connection is required. It is well suited for new construction and retrofit HVAC installations where a main trunk duct needs a defined starting point for downstream air distribution. The galvanized steel construction resists corrosion in unconditioned spaces such as attics, crawlspaces, and mechanical rooms. Systems built to SMACNA and ACCA duct construction standards will find this collar consistent with those guidelines.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in unconditioned spaces
• Straight body pattern for direct inline trunk duct starting connections
• Rectangular profile at 24 inches by 12 inches fits standard trunk duct sizing
• Manufactured to ACCA and SMACNA applicable standards
• Starting collar design establishes the origin point of a rectangular trunk duct run

Compatibility

Designed as an OEM-style sheet metal component for use in rectangular trunk duct systems built to SMACNA and ACCA ductwork construction standards. Suitable for standard 24-inch by 12-inch rectangular trunk duct configurations in residential and light commercial forced-air systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic familiar with SMACNA duct construction standards. Shut down and lock out the air handling unit before connecting or modifying any duct components. Secure the collar to the trunk duct using appropriate sheet metal screws and seal all joints with UL 181-rated mastic or foil tape to prevent air leakage. Consult local mechanical codes and ACCA Manual D guidelines for proper duct sizing and layout before installation.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Body Pattern: Straight
• Type: Starting, Rectangular
• Length: 24 inches
• Width: 12 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_24X12