What Does an Energy Audit Include? A Complete Breakdown

 Reducing utility bills, improving comfort, and meeting sustainability targets usually starts with one step: Energy audits. A well-run audit doesn’t just point out “wasted energy” it shows where losses happen, how much they cost, and which upgrades deliver the best payback with the least disruption.

This guide breaks down what’s typically included, what deliverables you should expect, and how to turn findings into real savings.

What an Energy Audit Actually Does

An energy audit is a structured assessment of how a facility uses energy and where inefficiencies occur. The goal is to quantify consumption drivers (HVAC, lighting, plug loads, process loads, hot water, controls, and the building envelope), then recommend improvements with cost and savings estimates.

A quality audit answers questions like:

• What systems consume the most energy and why?

• Where are the biggest losses (equipment, controls, operations, envelope)?

• Which upgrades save the most per dollar invested?

• What is the expected payback period and implementation complexity?

Types of Energy Audits and When to Use Each

Not all audits go to the same depth. Energy audits are usually scoped in levels depending on building size, data availability, and whether you’re planning capital upgrades.

1) Walkthrough / Preliminary assessment

Best for quick wins and high-level screening:

• Visual checks of major systems

• Basic utility review

• List of low-cost operational fixes

2) Detailed / Diagnostic audit

Best for facilities that want reliable ROI and project planning:

• System-level analysis (HVAC, lighting, controls, pumps, motors)

• Targeted measurements and short-term logging

• Preliminary engineering calculations and savings models

3) Investment-grade audit

Best for large capital programs and performance contracts:

• Engineering-grade modeling and tighter accuracy

• Detailed project scopes, budgets, and implementation plans

• Measurement and verification planning

Step-by-Step: What’s Included in a Professional Audit

Pre-audit planning and data request

Before anyone visits the site, auditors typically gather baseline information. For Energy audits, this step is crucial because it shapes where to focus time during site work.

Common data requested:

• 12–36 months of utility bills (electricity, gas, district cooling, water)

• Building drawings (architectural, MEP, single-line diagrams if available)

• Equipment lists (chillers, AHUs, pumps, boilers, cooling towers, etc.)

• Operating schedules, occupancy patterns, and setpoints

• Previous maintenance records and known comfort complaints

Site walkthrough and facility interviews

On-site work usually starts with a walkthrough and structured interviews to understand how the building really operates (not just how it was designed to operate).

Typical walkthrough focus areas:

• Mechanical rooms and plant equipment condition

• Air distribution issues (hot/cold spots, noise, balancing)

• Lighting types, controls, and usage patterns

• Plug load behavior (IT rooms, pantry equipment, tenant loads)

• Evidence of infiltration (drafts, door seals, poorly sealed penetrations)

Utility, tariff, and demand analysis

A strong audit doesn’t only look at total kWh—it examines peak demand, tariffs, and time-of-use patterns. Energy audits often uncover savings by shifting loads, reducing peak demand, or correcting billing and metering issues.

What this analysis may include:

• Monthly and seasonal consumption trends

• Peak demand drivers and demand spikes

• Power factor review (where applicable)

• Benchmarking against similar buildings (EUI comparison)

Equipment inspection and field measurements

This is where findings become measurable rather than “best guesses.” Energy audits may involve spot readings or temporary loggers, depending on scope.

Measurements and checks often include:

• Supply/return air temperatures, chilled water temps, and delta-T

• Pump/fan speeds, control valves, and VFD settings

• Motor nameplate checks and loading estimates

• Lighting levels (lux) and over-illumination checks

• Compressed air leaks or pressure settings (industrial sites)

Tools commonly used

• Clamp meters and power analyzers

• Temperature and humidity meters

• Data loggers for trend capture

• Infrared thermography (where helpful)

Building envelope and heat gain review

Envelope performance influences heating/cooling load. Even without invasive testing, auditors can identify major envelope-related losses.

What gets reviewed:

• Glazing type, shading, and solar gain exposure

• Roof and wall insulation indications (where accessible)

• Air leakage points around doors, loading docks, and shafts

• Thermal bridges and hot spots (sometimes via IR imaging)

Controls and operational scheduling review

A surprising amount of waste comes from scheduling and control logic rather than equipment efficiency.

Common controls-related findings:

• Equipment running outside occupancy hours

• Simultaneous heating and cooling

• Fixed setpoints that never reset (static pressure, chilled water, supply air temp)

• Poor sensor placement or failed sensors causing over-conditioning

• Manual overrides that became “permanent”

What’s Typically Included in the Final Audit Report

The report is the deliverable you’ll use to secure approvals and plan projects. For Energy audits, a useful report is specific, quantified, and easy to implement—not a generic checklist.

Most good reports include:

• Executive summary with top opportunities and expected savings

• Baseline energy profile (kWh, peak demand, cost breakdown)

• Findings by system (HVAC, lighting, controls, envelope, DHW, process loads)

• Recommended measures with:

• Estimated capex and opex impacts

• Annual energy savings (kWh) and cost savings

• Payback period and/or IRR (when required)

• Implementation difficulty and disruption level

• Photo documentation and site observations

• Measurement notes and assumptions used in calculations

Common Recommendations You’ll See (and Why They Work)

Across most commercial buildings, Energy audits tend to prioritize measures that reduce runtime, reduce demand, and improve part-load performance.

Low/no-cost operational improvements

• Scheduling corrections for HVAC and lighting

• Setpoint tuning and deadband adjustments

• Maintenance fixes (dirty coils/filters, stuck dampers, leaking valves)

• Rebalancing airflow and addressing short cycling

Moderate capex upgrades with strong ROI

• LED retrofits with occupancy/daylight controls

• VFDs for pumps and fans (when loads vary)

• Demand-controlled ventilation in variable-occupancy areas

• Heat recovery for fresh air handling or hot water preheating

Higher capex, longer-term measures

• Chiller/boiler replacements based on lifecycle cost

• Plant optimization and sequencing upgrades

• Envelope improvements (targeted glazing film, sealing, insulation upgrades)

• BMS upgrades and trend-based optimization

How to Prepare for an Audit and Get Better Results

A little prep improves accuracy and shortens audit time. Energy audits run best when data and access are organized in advance.

Preparation checklist:

• Provide complete utility data and confirm meter mapping

• Arrange access to plant rooms, roofs, and tenant areas

• Share operating schedules and any “special events” usage patterns

• Assign one facility contact who can answer operational questions

• Note recurring complaints (comfort, humidity, odors, noise)

Questions worth asking your auditor:

• What level of accuracy will savings estimates have?

• How will you validate assumptions (logging, spot checks, BMS trends)?

• Will recommendations include implementation sequencing and phasing?

• Can you support tender specs or contractor scope documents?

Turning Audit Findings Into Real Projects

The value comes from execution. Energy audits should feed directly into a practical roadmap: quick wins now, deeper retrofits later, and controls improvements that keep savings from drifting.

A strong implementation path typically includes:

• A prioritized list of measures (by ROI and ease)

• A 3–12 month action plan for operational fixes

• A 1–3 year capital plan for upgrades and replacements

• A measurement plan to confirm savings after changes

In many cases, the next step is translating recommendations into design-ready scopes especially where system modifications, control rewrites, or equipment replacements are involved. That’s where Electromechanical design work becomes essential to move from “recommendation” to buildable drawings, specifications, and contractor-ready packages.