{"product_id":"2018-uniform-mechanical-code","title":"2018 Uniform Mechanical Code","description":"\u003ch2\u003e\u003cspan\u003e2018 Uniform Mechanical Code (UMC)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e2018 Uniform Mechanical Code (UMC®)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e provides comprehensive requirements for the installation and maintenance of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eheating, ventilation, cooling, and refrigeration systems\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Developed through the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eANSI Consensus Process\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and designated as an American National Standard by the American National Standards Institute (ANSI), the 2018 UMC reflects modern practices and technologies in the mechanical industry.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 2018 edition represents an important milestone in mechanical and HVAC standards, introducing specific provisions for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003elow-flammability A2L and B2L refrigerants\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. These refrigerants are associated with lower Global Warming Potential (GWP), making the 2018 UMC an important reference for professionals working with evolving refrigeration technologies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe code was developed with contributions from a broad range of industry stakeholders, including consumers, code officials, installers, maintenance professionals, manufacturers, laboratories, experts, and other users.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Updates in the 2018 Uniform Mechanical Code\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 2018 UMC includes significant updates and new requirements covering mechanical, HVAC, refrigeration, duct, hydronic, and fuel gas systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMechanical Systems \u0026amp; Exhaust\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eNew clearance requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003esolid-fuel-burning appliances\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUpdated requirements for ducts serving \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eType I hood exhaust systems\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNew provisions for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eproduct-conveying ducts\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNew requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eType I and Type II exhaust systems\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eDuct Systems \u0026amp; Air Distribution\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eNew duct system sizing provisions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUpdated \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003educt leakage testing requirements\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eRevised installation and closure requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eflexible air ducts\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNew provisions for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eair dispersion systems\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eFurnaces \u0026amp; Pressure Regulators\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eNew requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epressure regulators\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUpdated requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eelectric furnaces\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eRefrigeration Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eNew requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eA2L and B2L low-flammability refrigerants\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUpdated \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003erefrigeration machinery room\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e requirements\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRequirements addressing machinery room access, openings, detectors, and ventilation systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNew provisions for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epressure-limiting devices for compressors\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eHydronic Piping Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eNew \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epressure testing requirements\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for piping and components\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eUpdated requirements for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eexpansion tanks\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNew requirements covering materials used in hydronic systems\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eFuel Gas Piping Systems\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eUpdated 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