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.
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
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.