{"product_id":"2021-uniform-mechanical-code-soft-cover-with-tabs","title":"2021 Uniform Mechanical Code Soft Cover with Tabs","description":"The 2021 edition of the Uniform Mechanical Code (UMC®) represents the most current approaches in the mechanical field. It is the seventh edition developed under the ANSI Consensus process is designated as an American National Standards by the American National Standards Institute (ANSI). Furthermore, it addresses specific provisions for low flammability refrigerants such as A2L and B2L; which makes it one of the first codes in the industry to address specific provisions for these low Global Warming Potential (GWP) refrigerants. Contributions to the content of this code were made by every segment of the built industry, including such diverse interests as consumers, enforcing authorities, installers\/maintainers, labor, manufacturers, research\/standards\/ testing laboratories, special experts and users.\nThe UMC provides complete requirements for the installation and maintenance of heating, ventilating, cooling and refrigeration systems, while at the same time allowing latitude for innovations and new technologies. Key changes to the 2021 UMC include:\nNew Appendix F Geothermal Energy Systems\nNew guards and rails requirements for installation of equipment and appliances on roofs\nNew ventilation requirements for transient and nontransient occupancies\nNew ventilation requirements for indoor air quality for residential occupancies Revisions to the requirements for air ducts, including factory-made air ducts and dampers\nNew provisions for factory-built grease ducts\nNew provisions for refrigeration systems, including pressure-limiting devices and hydrostatic expansion\nRevisions to the sizing requirements for natural gas and propane piping systems\nModifications to the pressure rating requirements for hydronic piping applications\nNew requirements for fuel gas piping appliance shutoff valves, test pressure, and overpressure protection devices\nNew tube fastener provisions for radiant heating and cooling\nNew requirements for residential compressed natural gas (CNG) fueling systems\nNew fire-extinguishing equipment and carbon monoxide detection requirements for exhaust systems\u003cbr\u003eASIN: 194436644X\u003cbr\u003eVSKU: GBV.194436644X.G\u003cbr\u003eCondition: Good\u003cbr\u003eAuthor\/Artist:The International Association of Plumbing and Mechanical Officials\u003cbr\u003eBinding: Paperback\u003cbr\u003e\u003cb\u003eNote:\u003c\/b\u003e Any images shown are stock photographs and product may differ from what is shown.  \u003cbr\u003e\u003cb\u003eCondition Notes\u003c\/b\u003e: Ex library book with stickers and stamps.  \u003cbr\u003e","brand":"Good Books Company","offers":[{"title":"Default Title","offer_id":56482102542641,"sku":"GBV.194436644X.G","price":108.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/3730\/2065\/files\/194436644X-0.jpg?v=1790458653","url":"https:\/\/goodbookscompany.org\/products\/2021-uniform-mechanical-code-soft-cover-with-tabs","provider":"Good Books Company","version":"1.0","type":"link"}