ISO 17743:2016

Overview - What ISO 17743:2016 covers

ISO 17743:2016 defines a methodological framework for calculating and reporting energy savings. It applies to both implemented (actual) and prospective (expected) measures and actions intended to reduce energy consumption. The standard is a framework intended to support consistent energy saving determination across regions, cities, organizations, projects and to be applicable by other standards in the energy-saving domain.

Key exclusions: the development of detailed methodologies for measurement & verification (M&V) and the construction of scenarios for future measures are explicitly out of scope.

Key technical topics and requirements

ISO 17743:2016 establishes core concepts and principles rather than prescriptive calculation formulas. Major technical topics include:

• Terminology and definitions: standardizes terms such as energy baseline, energy savings, adjusted/unadjusted savings, reporting period, EPIA (energy performance improvement action).
• System boundaries: guidance on defining the spatial/organizational scope (facility, building, region, sector) and allocation rules to avoid double counting.
• Baseline determination: principles for selecting and adjusting a baseline period used for comparison.
• Methods for determination: three main approaches described:
  • Statistical indicator‑based method - relates aggregate energy consumption to drivers (e.g., production, floor area).
  • Measure‑based (EPIA) method - aggregates savings for individual measures or actions.
  • Total consumption‑based method - compares measured consumption between baseline and reporting periods.
• Adjustments: treatment of unadjusted vs. adjusted energy savings, routine adjustments and types of adjustments to account for relevant variables (e.g., weather, occupancy, production levels).
• Reporting principles and data: guidance on the information and formats needed to communicate energy savings consistently and transparently.

Practical applications and users

ISO 17743:2016 is intended for a wide range of stakeholders:

• Policy makers and government agencies designing and evaluating energy efficiency programs.
• Energy managers, facility operators and sustainability teams establishing baselines and reporting corporate or site-level savings.
• Consultants, auditors and NGOs needing a consistent framework to quantify savings for projects, incentives or voluntary agreements.
• Standard developers using ISO 17743 as a framework to align other energy-savings standards.

Practical uses include establishing consistent baselines, selecting appropriate calculation methods (indicator‑based, measure‑based, or consumption‑based), applying adjustments, and preparing transparent reports to support decision-making, funding or regulatory compliance.

Related standards

• ISO 50001 (energy management systems)
• ISO 50015 (measurement & verification concepts for energy performance)
• ISO 50006 (energy performance indicators)
• ISO/IEC 13273 series (energy statistics terminology)

Keywords: ISO 17743:2016, energy savings, methodological framework, energy baseline, statistical indicator-based method, EPIA, system boundary, reporting energy savings.