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Main page>ASTM Standards>91>91.010>91.010.99>ASTM E1121-15R26 - Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
Released: 01.04.2026

ASTM E1121-15R26

Standard Practice for Measuring Payback for Investments in Buildings and Building Systems

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Standard number:ASTM E1121-15R26
Released:01.04.2026
Status:Active
Pages:9
Section:04.11
Keywords:benefit-cost analysis; building economics; economic evaluation methods; engineering economics; investment analysis; life-cycle cost analysis; maximum acceptable payback period; net benefits; net savings; payback; sensitivity analysis; simple payback;
ASTM number:ASTM E1121
Supersedes:E1121-15R20E01
DESCRIPTION

1.1 This practice provides a recommended procedure for calculating and applying the payback method in evaluating building designs and building systems.

1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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