How to choose · Business energy
Where a business should start with energy efficiency
Last updated 25 October 2026 · 2 sources listed · Reading time about 3 minutes
Short answer
Begin by measuring: sub-metering or interval data shows when and where energy goes. Typical priorities are lighting controls, heating and cooling schedules and setpoints, compressed air and refrigeration leaks, motor and drive upgrades, and building envelope fixes. A walk-through audit by a qualified assessor ranks measures by disruption and benefit. Support schemes and mandatory audit rules vary by country.
Who this is for: A manager of an office, shop, workshop or small facility wanting to reduce energy use but unsure of priorities.
What to evaluate
Load profile
Knowing base load and peaks shows whether waste is out-of-hours or in operation.
How to check: Obtain half-hourly data and compare weekday, weekend and night patterns.
Heating, cooling and ventilation
Space conditioning is often the largest load in commercial buildings.
How to check: Review schedules, setpoints and maintenance of equipment.
Lighting and controls
Lights left on and outdated fittings waste energy.
How to check: Audit fittings and consider occupancy and daylight sensors.
Process and plant
Motors, compressors and refrigeration can offer large savings.
How to check: Check for leaks, oversizing and the possibility of variable-speed drives.
Behaviour and ownership
Savings erode without responsibility and feedback.
How to check: Assign an owner and review data regularly.
Regulatory and support context
Some regions require audits or reporting and offer support.
How to check: Consult your energy agency about duties and schemes.
Comparison
| Measure | Good when | Watch out for |
|---|---|---|
| Scheduling and setpoints | Equipment runs when nobody is present | Comfort complaints without consultation |
| Lighting upgrade and controls | Old fittings and long hours | Poor light quality if rushed |
| Variable-speed drives | Motors run at partial load | Compatibility and harmonics |
| Envelope improvements | Poor insulation or air leakage | Disruption and long timeline |
Decision worksheet
Rate up to three options against this guide’s own criteria. It runs in your browser and saves only on this device. It is a thinking aid, not a recommendation.
1. Have you checked each criterion?
0 of 6 criteria checked.
2. Compare options (0 = fails or unknown, 3 = meets it well)
| Criterion | |||
|---|---|---|---|
| Load profile | |||
| Heating, cooling and ventilation | |||
| Lighting and controls | |||
| Process and plant | |||
| Behaviour and ownership | |||
| Regulatory and support context | |||
| Total (max 18) | 0 | 0 | 0 |
Questions to ask before you commit
- What does the interval data show for nights and weekends?
- Which loads run out of hours and why?
- Which measures need no capital outlay?
- Do we have maintenance records for heating and cooling?
- Who will own the energy plan?
- Are there mandatory audit or reporting duties?
- Which support schemes exist locally?
- How will we verify savings afterward?
Typical trade-offs
Start with no-cost operational changes
- Upside
- Quick results
- Downside
- Limited ceiling
Invest in equipment upgrades
- Upside
- Durable reduction
- Downside
- Capital and disruption
Hire an external auditor
- Upside
- Expertise and prioritisation
- Downside
- Cost and possible bias
Common mistakes
- Buying equipment before understanding the load profile.
- Cutting heating or cooling without consulting staff. Involve the staff who run the equipment day to day, because they usually know which machines run unnecessarily and which settings were changed without record.
- Leaving savings unverified.
- Ignoring maintenance as a source of waste.
- Overlooking regulatory audit obligations.
Related questions
What is the first step?
Get data first. Use your supplier's interval data or install sub-meters to see when and where energy is used. A baseline allows you to find out-of-hours load, such as equipment left running overnight, and to prioritise by size of waste. Without data, measures are guesses and savings are hard to prove. Then assign someone in the organisation to own the plan, with a regular review of the readings so that gains persist.
How do I verify savings?
Compare consumption before and after the measure, adjusted for weather and business activity, over a comparable period. Standard measurement and verification protocols exist and are worth using for larger projects. Document baseline conditions, the measure implemented and any changes in occupancy or production, so the comparison is fair. Without adjustment, a mild season or a quiet quarter can make a measure look more effective than it really was.
Is an audit mandatory?
In some jurisdictions larger enterprises must carry out regular energy audits, while smaller firms may be exempt or covered by simplified rules. These obligations vary, so consult your national energy agency or regulator to see what applies to your size and sector. Even where an audit is optional, it is a structured way to identify measures, rank them by payback and support applications for funding, so many smaller businesses commission one voluntarily.
Do small firms get support?
Many countries run advisory services, loans or grants for business efficiency, sometimes aimed at smaller firms, but schemes change and differ between regions. Some offer free site visits or subsidised audits, others offer finance for equipment upgrades. Check your national energy agency, local government or business support body for what applies, and be cautious about private offers that claim to be official schemes without naming the programme.
Sources and further reading
These pages were reachable when we last checked. They informed definitions and rules referred to above; they do not endorse this guide. Where rules differ by country, check the authority for your location.
- Commercial buildings integration — U.S. Department of Energy, retrieved 27 October 2026
- Buildings — U.S. Department of Energy, retrieved 27 October 2026
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