{"product_id":"southwark-metal-20_18x8-trunk-duct-collar-18x8-straight","title":"Southwark Metal 20_18X8 Trunk Duct Collar 18x8 Straight","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SOUTHWARK METAL 20_18X8 is a straight-pattern starting collar designed for sheet metal trunk duct systems in forced-air HVAC installations. Fabricated from hot dip galvanized steel, this trunk duct collar provides a rigid, corrosion-resistant connection point where a branch or main trunk run begins off a plenum or larger duct section. It measures 18 inches by 8 inches and is built to dimensional standards recognized by SMACNA and ACCA. Sheet metal workers and HVAC installers use this collar during new construction and retrofit duct fabrication to establish clean, leak-resistant trunk connections.\u003c\/p\u003e\n\u003cp\u003eThis starting collar is suited for residential and light commercial forced-air duct systems where trunk lines originate from a supply plenum or air handler. The straight body pattern makes it a direct-fit starting point for rectangular trunk runs. It is appropriate for low-pressure supply or return duct applications where galvanized steel construction is required by design specifications or local mechanical codes.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHot dip galvanized steel construction for corrosion resistance in HVAC duct environments\u003c\/li\u003e\n  \u003cli\u003eStraight body pattern for direct trunk run starting applications\u003c\/li\u003e\n  \u003cli\u003e18 x 8 inch opening matches standard rectangular duct dimensions\u003c\/li\u003e\n  \u003cli\u003eMeets SMACNA and ACCA applicable standards for sheet metal ductwork\u003c\/li\u003e\n  \u003cli\u003eStarting collar design simplifies trunk duct layout at the plenum connection point\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style sheet metal component for use in standard rectangular trunk duct systems fabricated to SMACNA and ACCA dimensional guidelines.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by licensed sheet metal workers or HVAC technicians. Shut down the air handling system and de-energize the unit before beginning any duct connection work. Secure the collar to the plenum or duct section using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape in accordance with local mechanical code requirements. Refer to SMACNA duct construction standards for reinforcement and support specifications.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 18 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: Straight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Starting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable Standards\u003c\/strong\u003e: ACCA, SMACNA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 20_18X8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51283992052018,"sku":"20_18X8","price":27.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309277168.jpg?v=1781065327","url":"https:\/\/voomisupply.com\/products\/southwark-metal-20_18x8-trunk-duct-collar-18x8-straight","provider":"Voomi Supply","version":"1.0","type":"link"}