What this is
What is an energy review?
What is an energy review?
An energy review analyses a period of logged energy data to identify where consumption is concentrated, how it has changed, and where the largest realistic savings are available. It sits downstream of the consumption log: the review has nothing to analyse without reliable logged data behind it.
What is a significant energy use?
An area, process or piece of equipment that accounts for a substantial share of a site's energy consumption, or that offers substantial potential for improving performance. Identifying and ranking them is the core output of the review, not an optional appendix to it.
How does an energy review differ from an energy saving initiative?
The review identifies and prioritises opportunities; the initiative executes one of them and tracks its baseline, cost and result. A review that lists forty opportunities and starts none of them has done half the job, and an initiative with no review behind it may be solving the wrong problem.
Scope
When is an energy review required?
The review is the analysis step, and its most common misuse is skipping straight to a savings estimate without first ranking where the energy is actually consumed.
Use this template when
- A period's logged consumption data is complete enough to analyse, typically at the end of a reporting year
- A new record is needed; each one gets its own ID in the form ENR-2026-000
- A trigger event has occurred that could change where energy is used or how much: a new line, a major equipment change, a significant tariff or fuel change
- Objectives, a certification cycle or a customer disclosure need a current savings-opportunity picture behind them
- A linked record needs this one to exist: links energy log, asset
Do not use it for
- Energy Consumption Log, which records the readings this review depends on and cannot substitute for
- Energy Saving Initiative, which records the execution of one specific project the review identified, with its own baseline, cost and result
- Greenhouse Gas Inventory, which converts the reviewed consumption into an emissions figure rather than a savings opportunity
- Sustainability Objectives, which sets the targets this review reports progress against, rather than setting them itself
- A capital appraisal or procurement record, which is where a proposed project is actually approved and funded
Compliance mapping
Which ISO 50001 cl.6.3 requirements does this satisfy?
ISO 50001 cl.6.3 specifies what an energy review has to establish; it does not specify the format, which is why the defensibility of a review rests on whether the analysis and ranking were actually done.
| Clause | Requirement | Where it lands |
|---|---|---|
| ISO 50001 cl.6.3(a) | Analysis of energy use and consumption based on measurement and other data | Performance |
| ISO 50001 cl.6.3(b) | Identification of the areas of significant energy use | Significant energy uses |
| ISO 50001 cl.6.3(c) | Identification, prioritisation and recording of opportunities for improving energy performance | Opportunities |
| ISO 50001 cl.6.5 | Energy baseline established using the information in the energy review, as a reference for comparing energy performance | Performance |
| ISO 50001 cl.6.4 | Energy performance indicators appropriate to monitoring and measuring performance, determined and reviewed | Significant energy uses |
| ISO 50001 cl.6.6 | Normalisation factors affecting energy consumption and use considered when planning data collection | Performance |
| ISO 50001 cl.9.3 | Energy performance and the effectiveness of the energy management system reported to management review | Governance |
What it does not cover
- Energy Consumption Log, which supplies the metered data this review analyses and must exist before the review can be run.
- Energy Saving Initiative, which records a specific project's baseline, cost and result once the review has identified it as worth pursuing.
- Greenhouse Gas Inventory, which converts reviewed consumption into a Scope 1 or 2 emissions figure using separate factors.
- Sustainability Objectives, which sets the target the review's on-track assessment is measured against, rather than being set here.
- Capital investment appraisal, which is the financial process that actually approves and funds a proposed project, distinct from proposing it.
Global
Energy Review requirements by country
An energy review is rarely a distinct legal filing, but in several regimes it is close to a named audit obligation with its own scope and timing.
ENERGY STAR and DOE Better Plants EnPI frameworks
No general federal duty to conduct an energy review, though disclosure and incentive schemes reward a demonstrated EnPI and savings-opportunity record.
Adoption here is driven by customer expectation, incentive eligibility or voluntary certification rather than by a filing deadline.
Energy Savings Opportunity Scheme (ESOS)
Qualifying large undertakings must complete an energy audit covering total consumption, significant energy uses and cost-effective savings opportunities, at least every four years.
This review's structure maps closely onto an ESOS audit, but ESOS itself requires a lead assessor sign-off and a compliance notification this template does not by itself provide.
ISO 50001 cl.6.3
Certified organisations must conduct an energy review at defined intervals or after a significant change, establishing significant energy uses, current performance and opportunities.
Certification audits will examine this record directly for the ranked significant-energy-use list and the opportunity register, not just for a completed form.
How to complete it
How to complete an energy review, step by step
The review's fields produce numbers. What makes the review defensible is the analysis connecting those numbers to a decision.
The list of refrigeration, compressed air, lighting and the rest means little until each is expressed as a percentage of the site total. Ranking by that percentage, not by which area has the most obvious metering, is what points investigation and investment at the place it will do the most good.
Adjusting for production volume, weather and product mix is what separates a genuine change in performance from a coincidence of the period. Refrigeration load rising with a hot summer looks identical to refrigeration load rising because a compressor is failing, and only the adjusted comparison tells them apart.
An opportunity that was identified and never implemented is not a closed matter; it is a decision, explicit or by default, not to act. Recording opportunities identified against opportunities implemented, and why the gap exists, is what shows whether the review function or the funding process is where progress is actually stalling.
Setpoints, schedules and switching equipment off cost nothing and are consistently the most under-exploited category, because they compete for nobody's capital budget and depend entirely on operational discipline. A review that only tracks capital projects will miss the opportunities most within its own control.
What auditors find
Most common energy review findings
Findings against an energy review usually concern analysis that was skipped rather than data that was missing.
| Finding | Clause | What fixes it |
|---|---|---|
| Significant energy uses listed without a percentage share of total consumption. | ISO 50001 cl.6.3(b) | Require Percent Of Total against each entry and rank the list by it before the review is signed off. |
| Performance compared period to period without adjusting for production, weather or product mix. | ISO 50001 cl.6.6 | Complete the Adjusted For fields and use the adjusted intensity figure, not the raw one, as the basis for any conclusion. |
| Opportunities identified with no record of whether they were implemented. | ISO 50001 cl.6.3(c) | Track Opportunities Implemented against Opportunities Identified each cycle, and require a reason where the gap is not closing. |
| No-cost opportunities not distinguished from capital projects, so cheap fixes go unactioned. | ISO 50001 cl.6.3(c) | Report No Cost Opportunities Remaining separately, and route it to the operational owner rather than the capital process. |
| Review not linked to the objectives or the GHG inventory it is meant to feed. | ISO 50001 cl.9.3 | Populate Feeds GHG Inventory and Inventory ID, and confirm Objectives On Track against the current target, not a historical one. |
| Metering identified as inadequate with no action raised to fix it. | ISO 50001 cl.6.6 | Where Metering Adequate is answered Partly or No, raise the action record rather than noting the gap and repeating it next cycle. |
Case in point
Case in point: the review that ranked nothing
A site's annual energy review listed five significant energy uses, refrigeration, compressed air, lighting, process heating and motors, each marked stable or improving. No percentage of total consumption was recorded against any of them, and the review concluded performance was broadly satisfactory with no capital projects proposed.
An external ESOS-style audit the following year found refrigeration alone accounted for fifty-eight percent of site consumption and had been rising for three years once weather was accounted for, a fact the review could not have surfaced because it had never ranked significant energy uses by share of total. The fix was not a longer opportunity list; it was requiring the percentage-of-total figure before any trend judgement could be recorded.
The template
The template, field by field
The form exactly as it installs. Every field, option, score and conditional rule is editable, and the links to other templates come with it.
5 sections
- Reference
- ENV-032
- Archetype
- Review
- Record ID
- ENR-2026-000
- Scoring
- Savings opportunity
- Direction
- High is good
- Singleton
- No
- Basis
- ISO 50001 cl.6.3
- Links
- Links Energy Log, Asset
- Tags
- Environment, Energy
- Sections
- 5
- Fields
- 45
- Follow up fields
- 3
- Repeating sections
- 1
- Links out
- 3
Header
9 fieldsReview ID*
Auto sequence. Format ENR-2026-0000.
The record's own ID. Other templates point at this value.
Status*
Drives who this goes to next.
- Planned2 pts
- In progress2 pts
- Complete3 pts
- Deferred0 pts
- Open0 pts
- Closed3 pts
- Overdue0 pts
Date and Time*
Completed By*
Site*
Site ID*
Format SITE-000.
Links to FDN-001 Site ID
Period Covered*
Reviewed By*
Management System Standard
Performance
9 fieldsTotal Energy This Period*
Baseline Period Energy
Change Percent*
Intensity This Period*
Intensity Baseline
Intensity Change Percent*
Adjusted For Production Volume*
- Yes3 pts
- No0 pts
Adjusted For Weather
Refrigeration load rises with ambient temperature. Without adjustment, a hot summer looks like a failure.
- Yes3 pts
- No1 pt
Adjusted For Product Mix
- Yes3 pts
- No1 pt
Significant energy uses
Repeats6 fieldsEnergy Use*
Refrigeration, compressed air, lighting, heating, process, motors or utilities.
Consumption*
Percent Of Total*
Performance Indicator Defined*
- Yes3 pts
- No0 pts
Trend*
- Improving3 pts
- Stable2 pts
- Worsening0 pts
Improvement Opportunity
Opportunities
6 fieldsOpportunities Identified*
Opportunities Implemented*
Savings Achieved
No Cost Opportunities Remaining*
Setpoints, schedules and switching things off cost nothing and are usually not fully exploited.
Capital Projects Proposed
Capital Approved
- Yes3 pts
- Pending1 pt
- No0 pts
Governance
15 fieldsObjectives On Track*
- Yes3 pts
- Partly1 pt
- No0 pts
Metering Adequate*
- Yes3 pts
- Partly1 pt
- No0 pts
Awareness Activity Delivered*
- Yes3 pts
- No0 pts
Feeds GHG Inventory*
Inventory ID
Links to ENV-025 Inventory ID
Reported To Management Review*
Action Required*
Raise the action record, then enter its reference here.
- No2 pts
- Yes0 pts
Priority
- High0 pts
- Medium1 pt
- Low3 pts
CAPA ID
Format CAPA-2026-00000.
Links to FDN-014 CAPA ID
Action Owner
Next Review Due*
Energy Lead*
Signature*
Site Manager*
Second Signature*
ENV-032 · record IDs look like ENR-2026-000 · Links Energy Log, Asset
Open in KnowellaRun it with agents
From a document you fill in to a programme that runs itself
The review is an analysis exercise. What fails around it is the ranking nobody finished, the opportunity nobody revisited, and the link to the objective it's supposed to be reporting against.
Holds the review against the consumption log and asset register it depends on, and carries the significant-energy-use ranking and opportunity register forward into the next cycle.
Takes a metering-adequacy gap or an equipment-linked opportunity out of the review and into a work order, so a finding does not sit as a note nobody actions.
Tracks opportunities identified against implemented across cycles, and flags where the same no-cost item has gone unactioned for a second review running.
This template lives in KnowEnviro — environment and energy. Aspects, permits, waste, emissions, spills and sustainability reporting.
Meet KnowEnviro→Glossary
Energy Review definitions and key terms
- Significant energy use (SEU)
- An area, process or item of equipment accounting for substantial energy consumption, or offering substantial potential for improved performance, and the primary unit the review ranks.
- Energy baseline
- A quantified reference point for energy performance, drawn from the review, against which future performance is compared.
- Normalisation
- Adjusting a comparison for factors that genuinely vary between periods, such as production volume, weather or product mix, so the remaining difference reflects actual performance.
- No-cost opportunity
- An improvement achievable through setpoints, schedules or operational change with no capital spend, distinct from a project requiring investment.
- Energy performance indicator (EnPI)
- A quantified measure of energy performance, such as intensity or a significant energy use's share of total, defined so it can be tracked consistently between reviews.
FAQ
Frequently asked questions about energy review
How often should an energy review be run?+
At least yearly is standard practice and aligns with most management-system and disclosure cycles, but a significant change, new equipment, a major process change, a large tariff shift, should trigger one outside the schedule rather than waiting for the interval.
Does the review need to rank every energy use, however small?+
No. It needs to rank enough of total consumption that nothing significant is left unranked, commonly the uses that together account for the large majority of the site's total. A long tail of small, well-understood uses does not need the same scrutiny as the top few.
Should raw or normalised figures decide whether performance improved?+
Normalised. A raw total flatters a quiet period and damns a busy one for reasons that have nothing to do with how efficiently the site is run. The adjusted intensity figure is the one that should carry any conclusion in the review.
What should happen to an opportunity that's identified but not funded?+
It stays open and visible, carried into the next review with a stated reason it wasn't implemented, rather than dropped from the list. A review that only shows this cycle's opportunities loses the ability to show whether the same easy wins keep getting missed.
Who should be involved in the review?+
Facilities, who hold the consumption data and site knowledge, together with engineering, who understand the equipment and what a capital project would involve. A review written by one function alone tends to either miss the operational detail or overstate what capital can realistically deliver.
How does the review connect to certification?+
Under ISO 50001, cl.6.3 makes the review a direct audit target: assessors will expect to see significant energy uses identified, current performance established and opportunities recorded and prioritised, not just a document that exists.
Keep going
Related templates and programmes
Industries this is written for
Programmes this belongs to
Used together in Energy and Decarbonisation
Greenhouse Gas Inventory
Records emissions across scope 1, 2 and where available scope 3
Energy Consumption Log
Records energy use by source and area
Energy Saving Initiative
Records an energy reduction project, its baseline, its cost and its result
Sustainability Objectives
Sets environmental and sustainability targets with measures, owners and dates
Packaging Sustainability Review
Reviews packaging materials for recyclability, weight and recycled content
Supplier Environmental Assessment
Assesses a supplier's environmental performance and certifications
Written and reviewed by
Siddarth Singh
Founder & Chief Executive Officer, Knowella
Certified Safety Professional and industrial and systems engineer with more than a decade inside food supply chain, freight and manufacturing operations. This page was written against the current text of the standards it cites, not against secondary summaries of them.
- Certified Safety Professional (CSP), Board of Certified Safety Professionals
- MBA, University of Chicago Booth School of Business
- MS and BS, The Ohio State University, Industrial and Systems Engineering
- Six Sigma Black Belt
Sources and last review. Reviewed 16 August 2026 against:
- ISO 50001:2018 clauses 6.3, 6.4, 6.5 and 6.6
- UK Energy Savings Opportunity Scheme (ESOS) Regulations 2014
- US DOE Better Plants and ENERGY STAR energy performance indicator guidance
This page is general guidance, not legal advice. Confirm requirements with your jurisdiction’s regulator.