{"product_id":"southwark-metal-23_22x8-trunk-duct-collar-22x8-inch","title":"Southwark Metal 23_22X8 Trunk Duct Collar 22x8 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SOUTHWARK METAL 23_22X8 is a sheet metal trunk duct collar takeoff designed for rectangular duct systems in forced-air HVAC installations. Fabricated from hot dip galvanized steel, this offset starting collar provides a secure, airtight transition point where a branch duct or register boot connects to the main trunk duct. With a body dimension of 22 inches by 8 inches, it fits standard residential and light commercial trunk duct configurations. HVAC sheet metal mechanics and duct installers use this fitting to begin lateral duct runs off the main supply trunk. The offset design accommodates tight plenum spaces and finished ceiling applications where a straight takeoff would not clear structural or architectural obstructions.\u003c\/p\u003e\u003cp\u003eThis collar is suited for residential and light commercial forced-air supply duct systems built to ACCA and SMACNA standards. It serves as the starting point for a rectangular duct branch coming off a trunk line, typically installed in attic, basement, crawlspace, or mechanical room ductwork layouts. The 22 by 8 inch size is a common trunk duct dimension in single-family and multifamily residential systems. Sheet metal duct fabricators and HVAC installers use this fitting during new construction and retrofit duct work where a starting collar is required at the trunk connection.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHot dip galvanized steel construction resists corrosion in unconditioned spaces\u003c\/li\u003e\n\u003cli\u003eOffset body pattern accommodates space-constrained trunk locations\u003c\/li\u003e\n\u003cli\u003eStarting collar design establishes the branch takeoff point on the main rectangular trunk\u003c\/li\u003e\n\u003cli\u003e22 inch by 8 inch size matches standard residential trunk duct dimensions\u003c\/li\u003e\n\u003cli\u003eFabricated to ACCA and SMACNA applicable standards for duct system integrity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and new-installation fitting for rectangular sheet metal trunk duct systems built to ACCA and SMACNA standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Shut down the air handling unit and confirm the system is de-energized before cutting into an existing trunk duct. Secure the collar with sheet metal screws and seal all joints with UL 181-rated mastic or metal-backed tape per SMACNA duct construction standards. Avoid installing the collar in a way that restricts airflow or places stress on adjacent duct sections.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 22 inches x 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot Dip Galvanized Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Pattern\u003c\/strong\u003e: Offset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Starting, Rectangular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standards\u003c\/strong\u003e: ACCA, SMACNA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SOUTHWARK METAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 23_22X8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51283981533490,"sku":"23_22X8","price":55.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309277162.jpg?v=1781064965","url":"https:\/\/voomisupply.com\/products\/southwark-metal-23_22x8-trunk-duct-collar-22x8-inch","provider":"Voomi Supply","version":"1.0","type":"link"}