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Content DescriptionASHRAE Standard 118.1 provides test procedures for rating directly heated commercial service water heating equipment. The revised 2022 edition of the standard: Updated the scope to be consistent with the Department of Energy\'s July 11, 2015, final rule that establishes new definitions for "commercial" and "residential duty commercial" water heaters. Revised the definition of "heat-pump water heater." Updated the classification for Type III water heaters. Section 7.2, "Water Piping," was updated and defined visually in Figures 1 through 14. Updated venting requirements. Reviewed and revised all equations as appropriate for I-P and SI units. Revised apparatus for testing AS-HPWH with ducted discharge air. Revised test tolerances (Table 1). Updated supply water temperatures for testing heat pumps (Table 3). Revised test methods and calculations for all heat-pump water heaters (including air source) to be steady state, consistent with Types I, II, and III water heaters. Updated setting outlet water temperature for heating capacity for Types 1 through V water heaters. Added water heaters with multiple outlet water connections. Added new standby loss test method and calculations for Types II and III water heaters. Updated references and appendices.This book also exists in the following packages...Subscription InformationMADCAD.com ASHRAE subscriptions are annual and access is concurrency based (number of people that can access the subscription at any given time).
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About ASHRAEASHRAE, founded in 1894, is a building technology society with more than 50,000 members worldwide. The Society and its members focus on building systems, energy efficiency, indoor air quality and sustainability within the industry. Through research, standards writing, publishing and continuing education, ASHRAE shapes tomorrow’s built environment today.
ASHRAE was formed as the American Society of Heating, Refrigerating and Air-Conditioning Engineers by the merger in 1959 of American Society of Heating and Air-Conditioning Engineers (ASHAE) founded in 1894 and The American Society of Refrigerating Engineers (ASRE) founded in 1904.
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