Energy & Facility Audit

Energy & Facility Audit

Energy Audit plays a critical role in helping clients justify both the economic and environmental benefits of facility upgrade projects. With energy and operational expenses accounting for nearly 75% of a building’s lifecycle cost over 40 years—and energy alone representing about 30% of annual operational budgets—our Energy Audit services provide the insights needed for informed and strategic decision-making.

We deliver comprehensive analyses of facility components affecting energy consumption, enabling organizations to optimize performance, reduce costs, and enhance corporate sustainability. ENERSIS also supports clients throughout the Energy Audit Conditional Grant (EACG) application process, providing end-to-end guidance until results are finalized.

Under the Efficient Management of Electrical Energy Regulation 2008, installations consuming ≥ 3,000,000 kWh within any six consecutive months are required to appoint a Registered Electrical Energy Manager (REEM).
Our in-house REEM, registered with the Energy Commission, assists affected organizations in meeting regulatory compliance and achieving energy efficiency goals.

Level 1 – Walk-Through Audit

Item Description
Audit Objective Initial assessment of energy usage and management practices
Scope of Work • Walk-through site familiarization
• Desktop data analysis
• Review of general energy management system
Assessment Focus Energy supply, consumption patterns, losses, and operational practices
Analysis Performed Generation of energy intensity and high-level benchmarking
Energy Saving Measures (ESM) Recommendation of “no-cost” ESM
Deliverables Written report with board-level conclusion
Suitable For Facilities requiring quick energy insights or compliance screening

Level 2 – Standard / Comprehensive Audit

Item Description
Audit Objective Detailed evaluation of energy performance and inefficiencies
Scope of Work • Follow-up from Level 1 (where applicable)
• Minimum 7 days logging & metering on major energy-consuming equipment
• Review of system design, installation, operation & maintenance
Assessment Focus Detailed system energy inputs, usage patterns, and inefficiency sources
Analysis Performed • Building Energy Index (BEI) or Specific Energy Consumption (SEC)
• Load apportioning
• Energy Performance Indicators (EnPI)
Energy Saving Measures (ESM) Recommendation of no-cost, medium-cost & high-cost ESM
Deliverables Written report and formal presentation
Suitable For Commercial buildings, factories, and facilities planning energy investments or EACG

Level 3 – Investment Grade Audit (IGA)

Item Description
Audit Objective Investment-ready energy audit supporting capital decision-making
Scope of Work • Full scope of Level 1 & 2 (unless system-specific audit requested)
• Minimum 14 days logging & metering
• Detailed process and system performance review
Assessment Focus Technical, financial, comfort, and environmental performance
Additional Studies • Indoor Environmental Quality (IEQ) audit (if required)
• Comfort study (where relevant)
Analysis Performed Detailed ESM evaluation with NPV life-cycle investment analysis
Energy Saving Measures (ESM) Comprehensive and investment-grade ESM recommendations
Deliverables Written report, IAQ report (if applicable), and management presentation
Suitable For Large-scale retrofits, grant-funded projects (EACG), high-capital investments

Our Energy Audit Services Include

  • Detailed assessment of facility systems impacting energy usage and cost

  • Identification of inefficiencies and energy-saving opportunities

  • Optimization strategies and investment planning recommendations

  • Financial return analysis and long-term cost-benefit evaluation

  • Support for Energy Audit Conditional Grant (EACG) application and submission

  • Follow-up coordination until grant results are finalized

  • Guidance on enhancing building performance, compliance, and sustainability


Suitable For

  • Electrical utilities

  • Building infrastructure

  • Commercial complexes (e.g. shopping malls)

  • Heavy industries (cement, steel, semiconductors)

  • Manufacturing plants and factories