{"product_id":"southwark-metal-28rr_4x12x7-duct-end-boot-4x12-to-7-inch","title":"Southwark Metal 28RR_4X12X7 Duct End Boot 4x12 to 7 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SOUTHWARK METAL 28RR_4X12X7 is a right-offset rectangular-to-round sheet metal duct end boot used to transition a rectangular duct opening to a round register collar. Fabricated from hot-dipped galvanized steel, this fitting connects a 4 inch by 12 inch rectangular duct face to a 7 inch round collar. It is a standard register boot designed for forced-air HVAC distribution systems in residential and light commercial construction. HVAC installers and sheet metal contractors use this fitting at the terminal end of a supply duct run where a floor, wall, or ceiling register is required.\u003c\/p\u003e\u003cp\u003eThis boot is suited for new construction and retrofit supply-air applications where a rectangular trunk or branch duct must terminate at a round-collar register. The right-offset profile positions the round collar off-center, accommodating framing constraints and floor joist layouts common in residential duct systems. It meets ACCA and SMACNA applicable standards for sheet metal duct fittings.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHot-dipped galvanized steel construction resists corrosion in HVAC duct environments\u003c\/li\u003e\n\u003cli\u003eRight-offset design accommodates framing constraints at register terminations\u003c\/li\u003e\n\u003cli\u003eRectangular-to-round transition connects 4 inch by 12 inch duct face to 7 inch round collar\u003c\/li\u003e\n\u003cli\u003eMeets applicable ACCA and SMACNA standards for sheet metal ductwork\u003c\/li\u003e\n\u003cli\u003eRegister-type boot suitable for floor, sidewall, or ceiling supply register installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style sheet metal fitting for residential and light commercial forced-air supply duct systems requiring a 4 inch by 12 inch rectangular face to 7 inch round collar transition at a register termination point.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a licensed HVAC technician or journeyman sheet metal worker. Shut down the air handler and confirm the system is de-energized before cutting into an existing duct run. Secure the boot to the duct using sheet metal screws and seal all joints with UL 181-listed duct mastic or metal-foil tape per SMACNA guidelines. Do not use standard cloth duct tape as a primary sealant.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot Dipped Galvanized Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize A (Rectangular Face)\u003c\/strong\u003e: 4 inches x 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize B (Round Collar Diameter)\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Register, Rectangular to Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOffset\u003c\/strong\u003e: Right\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: 28RR_4X12X7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51283951059250,"sku":"28RR_4X12X7","price":20.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309278660.jpg?v=1781063998","url":"https:\/\/voomisupply.com\/products\/southwark-metal-28rr_4x12x7-duct-end-boot-4x12-to-7-inch","provider":"Voomi Supply","version":"1.0","type":"link"}