Reaffirmed 2022

NATIONAL FOREWORD

This Indian Standard which is identical with ISO 17742 : 2015 ‘Energy efficiency and savings calculation for countries, regions and cities’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Energy Management Sectional Committee and approval of the Mechanical Engineering Division Council.

This standard provides a general approach for energy efficiency and energy savings calculations with indicatorbased and measure-based methods for the geographical entities countries, regions, and cities It also considers all end-use sectors, such as households, industry, tertiary (services, etc), agriculture, and transport.

It does not incorporate calculation of energy efficiency and energy savings in energy supply sectors, such as, power plants, refineries, and coal mines.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.