{"product_id":"southwark-metal-21r82026-model-21-end-cap-r8-insulation-20-inches-x-26-inches","title":"Southwark Metal 21R82026 Model 21 End Cap R8 Insulation 20 Inches X 26 Inches","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Southwark Metal 21R82026 is a Model 21 rectangular end cap designed for use with insulated rectangular ductwork. It is built for HVAC installations that require a clean, sealed termination point on a duct run. This end cap fits a duct size of 20 inches x 26 inches and includes R8 insulation, making it well suited for energy-efficient heating and cooling systems. It is sold individually as a single unit. HVAC technicians and sheet metal contractors rely on end caps like this one to close off the open end of a duct section, preventing air leakage and maintaining system pressure. A properly installed end cap also keeps debris, pests, and moisture out of the duct interior. The 21R82026 is fabricated from hot dipped galvanized steel meeting ASTM A653 CS Type B standards, which provides strong corrosion resistance for long service life in both conditioned and unconditioned spaces. The 26-gauge steel construction offers a good balance of rigidity and workability on the job. The S-Lock drive connection type makes field installation straightforward and compatible with standard rectangular duct systems. An S-cleat option is also available for added securing flexibility. Southwark Metal manufactures this product in the USA, and it carries a Prop 65 designation. The R8 insulation rating helps reduce thermal loss and condensation on the duct surface, supporting better overall system efficiency. This end cap is a practical, code-compatible component for new construction HVAC duct systems, commercial tenant improvements, and retrofit projects where a rectangular duct run must be properly capped and insulated.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel 21 rectangular end cap fits 20 inches x 26 inches duct openings with R8 insulation included\u003c\/li\u003e\n\u003cli\u003eFabricated from hot dipped galvanized steel per ASTM A653 CS Type B in 26 gauge for durability and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eS-Lock drive type connection for easy field installation; S-cleat option available\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\u003cp\u003eThe Southwark Metal 21R82026 delivers a durable, insulated end cap solution for rectangular duct systems, combining galvanized steel construction with R8 insulation and a standard S-Lock drive for reliable, efficient installation.\u003c\/p\u003e\u003ch3\u003eProduct Information\u003c\/h3\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: 21R82026\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape\u003c\/strong\u003e: Rectangle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Galvanized Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge\u003c\/strong\u003e: 26 GA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuct Size\u003c\/strong\u003e: 20 inches x 26 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Rating\u003c\/strong\u003e: R8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: S-Lock Drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanized Coating\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 26.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.75 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProp 65\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51120791879986,"sku":"21R82026","price":28.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/304885277.webp?v=1777739824","url":"https:\/\/voomisupply.com\/products\/southwark-metal-21r82026-model-21-end-cap-r8-insulation-20-inches-x-26-inches","provider":"Voomi Supply","version":"1.0","type":"link"}