Southwark Metal 20_25X10 Trunk Duct Collar 25x10 Straight

Product Description

The SOUTHWARK METAL 20_25X10 is a straight-body sheet metal trunk duct collar designed for use as a starting collar in forced-air HVAC duct systems. Fabricated from hot dip galvanized steel, this collar measures 25 inches by 10 inches and provides a secure, airtight transition point where a trunk duct originates from an air handler, furnace plenum, or main supply trunk. It is installed by sheet metal workers and HVAC technicians during new construction and retrofit ductwork projects. The straight body pattern simplifies alignment and reduces labor time at the starting point of a duct run.

This collar is suited for residential and light commercial forced-air applications where a trunk duct originates at the air handler or furnace. It fits into standard rectangular duct systems built to SMACNA and ACCA specifications. The 25-inch by 10-inch opening accommodates common trunk duct sizing in single-family and small commercial installations. Installers use this collar at the supply plenum connection or at any main trunk starting point where a full rectangular collar is required.

Key Features

• Hot dip galvanized steel construction resists corrosion in typical HVAC environments
• Straight body pattern for straightforward plenum or trunk starting connections
• 25-inch by 10-inch opening matches common trunk duct dimensions
• Meets SMACNA and ACCA applicable standards for sheet metal ductwork
• Starting collar type designed specifically for trunk duct origination points

Compatibility

Designed as an OEM-style replacement and new-construction starting collar for rectangular sheet metal trunk duct systems built to SMACNA and ACCA standards.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal workers in accordance with SMACNA duct construction standards and local mechanical codes. Shut down and lock out the air handling system before installing or modifying ductwork connections. Use appropriate sheet metal screws and UL-listed duct sealant or mastic to secure and seal all joints at the collar connection. Duct tape alone is not an acceptable long-term sealant per most mechanical codes.

Technical Specifications

• Size: 25 inches x 10 inches
• Material: Hot Dip Galvanized Steel
• Body Pattern: Straight
• Type: Starting
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_25X10