Southwark Metal 20_14X8 Trunk Duct Collar Straight 14x8

Product Description

The SOUTHWARK METAL 20_14X8 is a straight starting collar designed for sheet metal trunk duct systems in forced-air HVAC installations. Fabricated from hot dip galvanized steel, this collar provides a secure, leak-resistant connection point where branch takeoffs or supply boots transition from the main trunk line. At 14 inches by 8 inches, it fits standard rectangular trunk duct openings common in residential and light commercial ductwork. Licensed sheet metal mechanics and HVAC installers use this fitting when laying out or extending supply-air distribution systems built to SMACNA and ACCA standards.

This collar is suited for rectangular sheet metal trunk duct assemblies in new construction and retrofit applications. It functions as a starting collar, meaning it mounts at the origin point of a trunk run to establish the transition from the air handler or furnace plenum into the main duct. Typical use includes residential forced-air systems and light commercial builds where SMACNA-compliant ductwork is specified. The straight body pattern simplifies alignment during layout and reduces the need for field modification at the starting connection.

Key Features

• Hot dip galvanized steel construction resists corrosion in attic, crawl space, and mechanical room environments
• Straight body pattern allows direct, low-obstruction connection at trunk duct starting points
• 14 inches by 8 inches opening fits standard rectangular trunk duct dimensions
• Meets ACCA and SMACNA applicable standards for sheet metal duct fittings
• Starting collar design establishes the first connection point in a trunk-and-branch duct layout

Compatibility

Designed as an OEM-style replacement and new-installation fitting for rectangular sheet metal trunk duct systems requiring a 14-inch by 8-inch straight starting collar connection.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal mechanic in accordance with SMACNA ductwork installation standards. Power down and lock out the air handler or furnace before making any duct connections. Seal all collar joints with UL 181-rated duct sealant or approved mastic to prevent air leakage. Secure the collar to the trunk duct with sheet metal screws at all four flanges before applying insulation wrap where required by local energy codes.

Technical Specifications

• Size: 14 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_14X8