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IS 17006 : 2018Energy Audits for Buildings – Code of Practice

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ISO 50002 · ASHRAE Standard 211 · EN 16247-2
CurrentFrequently UsedCode of PracticeBIMMEP · Green Building and Sustainability
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OverviewValues5InternationalTablesFAQ4Related

IS 17006:2018 is the Indian Standard (BIS) for energy audits for buildings – code of practice. This code of practice establishes a common methodology for conducting energy audits in buildings. It defines different levels of audits (walk-through to investment-grade), outlines the process from data collection to reporting, and provides guidance on measurement and analysis to identify energy conservation opportunities.

Lays down procedures and methodologies for conducting energy audits in buildings to identify energy-saving opportunities.

Overview

Status
Current
Usage level
Frequently Used
Domain
MEP — Green Building and Sustainability
Type
Code of Practice
International equivalents
ISO 50002:2014 · International Organization for Standardization (ISO), InternationalASHRAE Standard 211-2018 · American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), USAEN 16247-2:2022 · European Committee for Standardization (CEN), EuropeASTM E2797-20 · ASTM International, USA
Typically used with
IS 2016
Also on InfraLens for IS 17006
5Key values3Tables4FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes
! A clear 'audit boundary' must be defined with the client before starting fieldwork to avoid scope creep and disputes.
! Ensuring instrument calibration is crucial for accurate results, as specified in the code. Maintain calibration records.
! The report's recommendations should be practical and include realistic cost-benefit analysis based on local utility tariffs and vendor costs, not just theoretical savings.
Frequently referenced clauses
Cl. 4Principles of Energy AuditCl. 5Energy Audit ProcessCl. 6Elements of Energy Audit ProcessCl. 7Energy Audit ReportingAnnex C - Typical Contents of an Energy Audit Report
Pulled from IS 17006:2018. Browse the full clause & table index below in Tables & Referenced Sections.

International Equivalents

Similar International Standards
ISO 50002:2014International Organization for Standardization (ISO), International
HighCurrent
Energy audits — Requirements with guidance for use
Provides a comprehensive framework and requirements for conducting all types of energy audits.
ASHRAE Standard 211-2018American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), USA
HighCurrent
Standard for Commercial Building Energy Audits
Defines procedures for Level 1, 2, and 3 energy audits specifically for commercial buildings.
EN 16247-2:2022European Committee for Standardization (CEN), Europe
HighCurrent
Energy audits - Part 2: Buildings
Specifies the requirements, methodology, and deliverables for an energy audit in a building or group of buildings.
ASTM E2797-20ASTM International, USA
MediumCurrent
Standard Practice for Building Energy Performance Assessment for a Building Involved in a Real Estate Transaction
Focuses on assessing energy performance for property transactions, overlapping with the walk-through audit methodology.
Key Differences
≠IS 17006 is a 'Code of Practice', providing guidance, whereas ISO 50002 sets 'requirements' which can be used for conformity assessment and certification of the audit process.
≠The Indian standard explicitly refers to Indian climatic zones and benchmarks from the Indian Energy Conservation Building Code (ECBC), while international standards are climatically generic or refer to their respective regional codes (e.g., ASHRAE standards).
≠IS 17006 defines audit types as Walk-through (WTA), Preliminary (PEA), and Detailed (DEA). ASHRAE 211 uses a similar but distinct 'Level 1, 2, 3' classification, which is more widely adopted internationally.
≠IS 17006 is more prescriptive about the format of the report and the specific indices to be calculated, reflecting a focus on national-level data aggregation and policy enforcement under India's Perform, Achieve and Trade (PAT) scheme.
Key Similarities
≈All standards follow a similar phased methodology: an opening meeting and planning, data collection, fieldwork/measurements, analysis of data, and a final report with recommendations.
≈The core objective across all standards is to identify, quantify, and prioritize Energy Conservation Opportunities (ECOs) or Energy Conservation Measures (ECMs).
≈All standards require the establishment of an energy balance for the facility, comparing delivered energy with accounted-for end-use consumption as a fundamental analysis step.
≈There is a common emphasis on the need for economic analysis of proposed measures, typically including Simple Payback Period (SPP), Return on Investment (ROI), and/or Life Cycle Cost Analysis (LCCA).
≈All standards stress the importance of defining the scope, boundary, and objectives of the audit in collaboration with the client before commencing fieldwork.
Parameter Comparison
ParameterIS ValueInternationalSource
Basic Audit LevelWalk-through Audit (WTA): A basic audit involving visual inspection, review of energy data, and interviews.Level 1 - Walk-Through Analysis: Assesses energy cost and efficiency via a brief on-site survey and analysis of utility data.ASHRAE Standard 211-2018
Detailed Audit LevelDetailed Energy Audit (DEA): Comprehensive audit with detailed measurements, data logging, and sophisticated analysis.Level 3 - Detailed Analysis of Capital-Intensive Modifications: In-depth analysis of specific measures, often requiring data logging and simulation.ASHRAE Standard 211-2018
Audit Process StartMandates a 'startup meeting' with management to define scope, objectives, and timeframe.Requires an 'opening meeting' to agree on the audit's objectives, scope, boundaries, and methodology with the organization.ISO 50002:2014
Financial Analysis MetricRecommends calculating Simple Payback Period (SPP), Return on Investment (ROI), and Internal Rate of Return (IRR).Requires an economic analysis for recommended measures, typically including simple payback, life-cycle cost, and savings-to-investment ratio.ASHRAE Standard 211-2018
Historical Data RequirementRecommends review of utility bills for at least the preceding one year, preferably three years.Requires collection of historical data. Typically, 12 to 36 months of utility bills are recommended for meaningful analysis.ASHRAE Standard 211-2018
Reporting RequirementSpecifies detailed report structure including Executive Summary, building description, energy analysis, ECOs, and action plan.The audit report shall include objectives, scope, methodology, results of analysis, and a prioritized list of recommendations.ISO 50002:2014
⚠ Verify details from original standards before use

Key Values5

Quick Reference Values
Level 1 Audit DescriptionWalk-through analysis to identify low-cost/no-cost measures.
Level 2 Audit DescriptionDiagnostic energy audit with detailed energy balance and cost analysis of measures.
Level 3 Audit DescriptionInvestment grade audit providing detailed analysis for major capital investments.
Energy Performance Index (EPI) unitkWh/m²/year
Typical instrument accuracy for power measurement±1 to ±2 percent
Key Formulas
EPI (kWh/m²/year) = Annual Energy Consumption / Total Built-up Area
Simple Payback Period = Total Investment Cost / Annual Energy Savings

Tables & Referenced Sections

Key Tables
Table 1 - Levels of Energy Audits
Table 2 - Data Requirements for Buildings
Table 3 - Common Parameters and Instruments for Measurement
Key Clauses
Clause 4 - Principles of Energy Audit
Clause 5 - Energy Audit Process
Clause 6 - Elements of Energy Audit Process
Clause 7 - Energy Audit Reporting
Annex C - Typical Contents of an Energy Audit Report

Related Resources on InfraLens

Cross-Referenced Codes
IS 2016:1967Plain washers - General purpose
→

Frequently Asked Questions4

What are the different levels of energy audits defined in this code?+
The code defines three levels: Level 1 (Walk-through analysis), Level 2 (Diagnostic energy audit), and Level 3 (Investment Grade audit). (Table 1)
What is the Energy Performance Index (EPI)?+
EPI is the total annual energy consumption in kWh divided by the total built-up area in square meters. It is a key metric to benchmark a building's energy performance.
What should a final energy audit report contain?+
The report must include an executive summary, building description, energy consumption analysis, energy saving recommendations with cost-benefit analysis, and an action plan. (Clause 7 & Annex C)
Is this standard mandatory?+
It is a code of practice, providing a standardized framework. Its adoption can be voluntary, required by a client, or mandated by specific government schemes or green building rating systems.

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