Southwark Metal 20_28X8 Trunk Duct Collar 28x8 in

Product Description

The SOUTHWARK METAL 20_28X8 is a straight, starting-style sheet metal trunk duct collar designed for use in forced-air HVAC duct systems. Fabricated from hot dip galvanized steel, this collar provides a durable, corrosion-resistant connection point where a branch takeoff or trunk line originates from a main duct. It measures 28 inches by 8 inches and conforms to ACCA and SMACNA fabrication standards. HVAC sheet metal mechanics and ductwork installers use this type of collar to establish clean, secure trunk-to-branch transitions in new construction and retrofit applications.

This collar is suited for residential and light commercial forced-air systems where rectangular trunk duct runs are fabricated or extended. The straight body pattern simplifies installation in confined mechanical spaces and equipment rooms. It is appropriate for supply-side trunk duct assemblies where a starting collar is needed at the air handler, furnace plenum, or rooftop unit discharge. Installers working to SMACNA duct construction standards will find this collar compliant with common sheet metal ductwork specifications.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in conditioned and semi-conditioned spaces
• Straight body pattern for direct trunk duct starting connections
• 28 inches by 8 inches size accommodates standard rectangular trunk duct dimensions
• Meets ACCA and SMACNA applicable standards for duct system fabrication
• Starting collar type establishes the trunk duct origin at the supply plenum or air handler outlet

Compatibility

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

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Power down and lock out the air handling equipment before beginning duct work. Secure the collar with sheet metal screws and seal all joints with listed duct sealant or UL 181-rated tape per applicable mechanical codes. Refer to SMACNA duct construction standards for joint reinforcement and support spacing requirements.

Technical Specifications

• Size: 28 inches x 8 inches
• Material: Hot Dip Galvanized Steel
• Body Pattern: Straight
• Type: Starting
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_28X8