Southwark Metal 20_22X8 Trunk Duct Collar 22x8 Straight

Product Description

The SOUTHWARK METAL 20_22X8 is a straight rectangular sheet metal trunk duct collar designed for starting takeoff connections in forced-air HVAC duct systems. Fabricated from hot dip galvanized steel, this collar provides a durable, corrosion-resistant transition point where a trunk duct originates or branches off a main supply plenum. It measures 22 inches in length by 8 inches in width and is built to ACCA and SMACNA standards, making it suitable for professional duct fabrication and installation work. HVAC sheet metal mechanics and duct installers use this collar in new construction and retrofit applications where a secure, properly sealed starting connection is required.

This collar is used in residential and light commercial forced-air systems where rectangular trunk duct runs originate from the supply plenum or a main duct transition. The straight body pattern allows for direct inline connection without angular offset, simplifying layout and reducing fitting complexity in standard trunk-and-branch duct designs. It is appropriate for installations that must comply with ACCA Manual D duct design guidelines and SMACNA duct construction standards.

Key Features

• Hot dip galvanized steel construction resists corrosion in both conditioned and unconditioned spaces
• Straight body pattern supports direct inline trunk duct connections
• Rectangular starting collar configuration suits trunk-and-branch duct layouts
• Meets ACCA and SMACNA applicable standards for sheet metal duct construction
• 22-inch by 8-inch opening fits standard rectangular trunk duct sizing

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.

Installation Notes

Installation should be performed by a qualified HVAC sheet metal mechanic. Shut down the air handling system and relieve any static pressure before fitting or fastening duct components. Secure the collar with sheet metal screws and seal all joints with UL 181-listed mastic or foil tape per SMACNA ductwork installation guidelines. Handle cut edges with care, as galvanized sheet metal edges are sharp.

Technical Specifications

• Length: 22 inches
• Width: 8 inches
• Body Pattern: Straight
• Type: Starting, Rectangular
• Material: Hot Dip Galvanized Steel
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_22X8