{"product_id":"southwark-metal-sp58_18x14-spiral-duct-reducer-18x14-24ga","title":"Southwark Metal SP58_18X14 Spiral Duct Reducer 18x14 24GA","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SOUTHWARK METAL SP58_18X14 is a tapped spiral round sheet metal duct reducer used to transition between two different round duct diameters in forced-air HVAC systems. Fabricated from hot-dipped galvanized steel at 24 gauge, it transitions from an 18-inch diameter larger end down to a 14-inch diameter smaller end. The tapped spiral construction provides a secure, low-leak connection point at each end. This fitting is installed by licensed HVAC technicians and sheet metal contractors during new construction ductwork layout or system modification projects where airflow must be redirected through a smaller diameter run.\u003c\/p\u003e\n\u003cp\u003eThis reducer is suited for residential and light commercial ducted HVAC applications where round spiral duct is the primary distribution method. It is used in supply trunk-to-branch transitions, air handler connections, and inline duct diameter changes. Fabricated to ACCA and SMACNA standards, this fitting meets the industry benchmarks for round spiral ductwork systems. The galvanized finish resists corrosion in both conditioned and unconditioned spaces such as attics, crawlspaces, and mechanical rooms.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTransitions from 18-inch diameter to 14-inch diameter round spiral duct\u003c\/li\u003e\n  \u003cli\u003e24 gauge hot-dipped galvanized steel construction for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eTapped spiral ends for secure mechanical connection to mating duct sections\u003c\/li\u003e\n  \u003cli\u003eMeets ACCA and SMACNA applicable standards for round ductwork fabrication\u003c\/li\u003e\n  \u003cli\u003eRound profile compatible with standard spiral duct fittings and connectors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and new-installation fitting for round spiral duct systems using 18-inch and 14-inch diameter sections in residential and light commercial forced-air HVAC applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified HVAC technician or licensed sheet metal contractor in accordance with SMACNA ductwork installation standards. Shut down and lock out the air handling system before installing or modifying any duct section. Secure all joints with the appropriate fasteners and seal with UL 181-listed duct sealant or mastic to minimize air leakage. Avoid over-tightening connections on the spiral tapped ends to prevent deformation of the fitting.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarger End Diameter\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmaller End Diameter\u003c\/strong\u003e: 14 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot-Dipped Galvanized Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Thickness\u003c\/strong\u003e: 24 Gauge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Tapped, Spiral, Round\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: SP58_18X14\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51283988939058,"sku":"SP58_18X14","price":68.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309278009.jpg?v=1781065226","url":"https:\/\/voomisupply.com\/products\/southwark-metal-sp58_18x14-spiral-duct-reducer-18x14-24ga","provider":"Voomi Supply","version":"1.0","type":"link"}