A useful energy audit starts with an ordinary week

A week of ordinary observations can reveal better questions about energy use than a single unusually busy day.

Record context alongside consumption

Choose a period that resembles normal use. Note occupancy, working hours, unusual weather and any equipment running for a special purpose. A consumption total without context can send an investigation in the wrong direction.

Use information already available from safe, authorised sources such as your meter portal or bills. Do not open electrical panels or install measuring equipment you are not qualified to use. This is a planning exercise, not an electrical inspection.

Look for explanations before solutions

Compare times when a building is active with times when it is quiet. If something unexpected appears, list possible explanations and check them one at a time. A refrigerator, security system or other necessary service may reasonably continue operating.

The International Energy Agency identifies an energy review or audit as a way to understand use and find maintenance or operating improvements in industry. A household notebook is not equivalent to a professional audit, but the habit of asking what is running and why is still useful.

Keep an observation log small enough to maintain

A useful log might have four columns: time period, energy reading, what was happening and anything unusual. Record whether the reading is a total or a change since the previous observation. That distinction prevents accidental comparisons between different quantities. If a meter portal already supplies a time series, keep a reference to the original rather than copying every value by hand. Add only the context that the portal cannot know, such as an event or an equipment fault.

Before comparing two periods, ask whether the activities were reasonably alike. An occupied office and a closed office are not interchangeable baselines. Nor should a cold week and a mild week be treated as identical if heating affects consumption. You can still learn from a difference, but describe the difference honestly. A notebook can identify questions for investigation without proving a cause. Avoid announcing a saving solely because the second total is smaller than the first.

Make the first action easy to reverse

For a hypothetical office, checking whether an agreed shutdown routine is actually followed could be a sensible observation task. It should not involve switching off essential systems or altering electrical installations. Agree who is responsible and note when the routine changes. Review the next comparable period before deciding whether to extend the approach. If an unexplained pattern persists, take the readings and context to someone qualified to assess it. This creates a clearer brief than asking for a major equipment replacement before the problem has been described.

Change one thing you can evaluate

Choose a safe, reversible action that does not compromise comfort or necessary services. Record when you made it and compare reasonably similar periods. Avoid treating a small difference as proof when weather or activity changed substantially.

For larger spending decisions, take your observations to a qualified adviser. The aim of the first week is a clearer problem statement. It should help distinguish a maintenance issue, an operating habit and a genuinely suitable investment.