full list 21.11.2017:

ISO/IEC 13273-1:2015 Energy efficiency and renewable energy sources -- Common international terminology -- Part 1: Energy efficiency
ISO/IEC 13273-2:2015 Energy efficiency and renewable energy sources -- Common international terminology -- Part 2: Renewable energy sources
ISO 17741:2016 General technical rules for measurement* calculation and verification of energy savings of projects
ISO 17742:2015 Energy efficiency and savings calculation for countries* regions and cities
ISO 17743:2016 Energy savings -- Definition of a methodological framework applicable to calculation and reporting on energy savings
ISO 50001:2011 Energy management systems -- Requirements with guidance for use
ISO 50002:2014 Energy audits -- Requirements with guidance for use
ISO 50003:2014 Energy management systems -- Requirements for bodies providing audit and certification of energy management systems
ISO 50004:2014 Energy management systems -- Guidance for the implementation* maintenance and improvement of an energy management system
ISO 50006:2014 Energy management systems -- Measuring energy performance using energy baselines (EnB) and energy performance indicators (EnPI) -- General principles and guidance
ISO 50007:2017 Energy services -- Guidelines for the assessment and improvement of the energy service to users
ISO 50015:2014 Energy management systems -- Measurement and verification of energy performance of organizations -- General principles and guidance
ISO 50047:2016 Energy savings -- Determination of energy savings in organizations


the missing:

ISO 17742:2015 Energy efficiency and savings calculation for countries* regions and cities


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