Measure & compare
Watts and kilowatt-hours: keep the time in the calculation
Use power, duration and a stated tariff to build a transparent scenario, while keeping measured and assumed values separate.
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Understand units, labels and observations.
Measure & compare
Compare annual energy labels before comparing running costs
Keep appliance category, capacity and label assumptions aligned before estimating a difference in annual energy charges.
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Measure & compare
Choose an energy monitor around the question it can answer
Choose between whole-home and appliance-level observations by identifying the scope and units you need first.
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Measure & compare
Keep a useful before-and-after energy diary
Keep dates, scope and household context with energy readings so a before-and-after comparison does not overstate what changed.
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