Southwark Metal 20_18X10 Duct Collar 18x10 in Straight

Product Description

The SOUTHWARK METAL 20_18X10 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 fitting provides a secure, corrosion-resistant transition point where branch runouts connect to the main trunk duct. Measuring 18 inches in length by 10 inches in width, it is sized for standard residential and light commercial ductwork layouts. Licensed HVAC sheet metal mechanics and duct installers use this type of collar to establish clean, leak-resistant takeoff connections that meet industry airflow distribution requirements.

This starting collar is suited for rectangular trunk duct assemblies in forced-air heating and cooling systems. It is used where a new duct run originates from the main supply trunk, making it a common component in both new construction and duct modification or replacement projects. The straight body pattern simplifies alignment during fabrication and field installation in tight mechanical spaces. It conforms to ACCA and SMACNA standards, making it appropriate for work that must meet commercial or residential mechanical code requirements.

Key Features

• Hot dip galvanized steel construction provides corrosion resistance for long-term duct system reliability
• Straight body pattern allows direct, low-restriction trunk takeoff connections
• Rectangular starting collar design integrates cleanly into standard trunk duct layouts
• Sized at 18 inches by 10 inches for common residential and light commercial duct configurations
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fabrication

Compatibility

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

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal mechanics working on forced-air duct systems. Shut down the air handling unit and confirm the system is de-energized before cutting into or modifying any existing trunk duct. Secure the collar using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape per SMACNA installation guidelines. Follow local mechanical codes for support spacing and duct sealing requirements.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Body Pattern: Straight
• Type: Starting, Rectangular
• Length: 18 inches
• Width: 10 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_18X10