Most recent
ANSI/ASHRAE 118.2-2022
Method of Testing for Rating Residential Water Heaters and Residential-Duty Commercial Water Heaters
Provides test procedures for rating the efficiency and hot-water delivery capabilities of directly heated residential water heaters and residential-duty commercial water heaters. Applies to water heaters designed to be capable of providing outlet water at a controlled temperature of at least the nominal outlet water temperature under the conditions specified by this test. Dual units of measurement.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]