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ANSI/ASHRAE Standard 228-2023
Standard Method of Evaluating Zero Net Energy and Zero Net Carbon Building Performance
Sets requirements for evaluating whether a building or group of buildings meets a definition of “zero net energy” or whether those buildings meet a definition of “zero net carbon.” It provides a consistent method of expressing qualifications for zero net energy and zero net carbon buildings associated with the design of new buildings and the operation of existing buildings. Covers a. existing buildings, new buildings, groups of buildings, or portions of buildings; b. determination, including calculation methodology, and expression of the building(s) zero net energy status; c. determination, including calculation methodology, and expression of the building(s) zero net carbon status; and d. energy and carbon emissions associated with flows across the site boundary and off-site credited flows. Dual units of measurement.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]