1.1 This practice provides a recommended procedure for calculating and applying the payback method in evaluating building designs and building systems.
ASTM E1121-98 history
2020ASTM E1121-15(2020)e1 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2015ASTM E1121-15 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2012ASTM E1121-12 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2007ASTM E1121-07e1 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2007ASTM E1121-07 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
2002ASTM E1121-02 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems
1998ASTM E1121-98 Standard Practice for Measuring Payback for Investments in Buildings and Building Systems