{"product_id":"southwark-metal-27_3-1-4x12x7-duct-boot-wall-stack","title":"Southwark Metal 27_3-1\/4X12X7 Duct Boot Wall Stack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SOUTHWARK METAL 27_3-1\/4X12X7 is a straight wall stack sheet metal duct boot fabricated from hot dip galvanized steel. It transitions from a rectangular duct opening to a round collar, directing conditioned air from a wall cavity into a room through a register or grille. The rectangular outlet measures 3.25 inches by 12 inches (Size A), and the round collar measures 7 inches in diameter (Size B). This boot is built to ACCA and SMACNA standards, making it suitable for residential and light commercial forced-air HVAC ductwork installations. HVAC technicians and sheet metal contractors are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis wall stack boot is designed for vertical duct runs inside wall cavities, delivering supply air at the floor or wall register level. It is commonly used in residential new construction and retrofit projects where a rectangular duct stack feeds a floor or baseboard register. The straight configuration allows a direct, unobstructed connection between the wall duct and the register face without any offset. It fits standard wall stack duct systems and is appropriate for both heating and cooling applications in forced-air systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHot dip galvanized steel construction resists corrosion in wall cavity environments\u003c\/li\u003e\n  \u003cli\u003eStraight wall stack configuration for direct, in-line duct-to-register connections\u003c\/li\u003e\n  \u003cli\u003e3.25 x 12 inch rectangular outlet (Size A) matches standard wall stack register openings\u003c\/li\u003e\n  \u003cli\u003e7 inch round collar (Size B) connects to standard round duct or flex duct\u003c\/li\u003e\n  \u003cli\u003eMeets ACCA and SMACNA applicable standards for residential and commercial duct fabrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and new-construction fitting for standard wall stack forced-air duct systems requiring a straight boot with a 3.25 x 12 inch rectangular face and a 7 inch round collar.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or sheet metal contractor familiar with SMACNA duct construction standards. Power down the air handler or furnace before connecting or modifying any duct components. Secure all joints with appropriate sheet metal screws and seal with UL 181-rated duct mastic or foil tape per local mechanical code requirements. Do not compress or restrict the round collar connection when attaching flexible duct.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot Dip Galvanized Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Wall Stack, Straight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize A (Rectangular Outlet)\u003c\/strong\u003e: 3.25 inches x 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize B (Round Collar)\u003c\/strong\u003e: 7 inches diameter\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: 27_3-1\/4X12X7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51283904659762,"sku":"27_3-1\/4X12X7","price":19.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309277029.jpg?v=1781062888","url":"https:\/\/voomisupply.com\/products\/southwark-metal-27_3-1-4x12x7-duct-boot-wall-stack","provider":"Voomi Supply","version":"1.0","type":"link"}