The key points

  • Compare similar capacity and features before interpreting star ratings.
  • Use labelled kWh and your actual usage tariff for an estimate.
  • Keep test assumptions and household use visible in the comparison.

Choose comparable appliances first

Group appliances by similar capacity, type and features before comparing energy stars. The Energy Rating programme explains that star ratings describe efficiency relative to comparable appliances. A larger model and a smaller model can have the same star rating while consuming different amounts of electricity.

Record the complete model number, capacity, energy consumption figure and the programme or usage information shown on each label. Check the model against the manufacturer's documents. If the label image is missing or unreadable, ask for the information instead of substituting a figure from a similar product.

Turn labelled electricity use into an estimate

For a label showing annual electricity use, multiply its kilowatt hours per year by your electricity usage rate in dollars per kilowatt hour. Use the rate on your own bill. For a simple illustrative example, 300 kWh per year multiplied by $0.35 per kWh gives an estimated $105 per year.

That example is arithmetic, not a quoted tariff, product claim or promised bill. The label figure comes from standardised testing, and your settings, frequency of use and conditions can change actual consumption. Keep fixed daily supply charges separate from the calculation of electricity used by an individual appliance.

Check the assumptions and add water where relevant

Read the label's stated test programme and usage assumptions. A household that rarely uses a dryer will have a different pattern from one using it most days. Treat any adjustment as an estimate and keep the method consistent between candidates. The government Energy Rating Calculator can provide another comparison using the models it lists.

For washers and dishwashers, use WELS information to compare water consumption per wash, capacity and the tested cycle. If you want an annual water estimate, multiply litres per wash by your assumed annual number of washes, then divide by 1,000 to obtain kilolitres. Apply your applicable usage rate and label the result as an estimate.

Use the figures as one part of the decision

Keep a compact comparison with purchase cost, estimated annual electricity use, relevant water use and required installation or accessory costs. Give all candidates the same assumed household pattern. You can also calculate several years of estimated usage costs, but keep future tariffs and changes in use visible as uncertainties.

Combine those figures with capacity, fit, usability and the individual item's condition. Avoid choosing unnecessary size just because a label looks appealing. Browse Value House listings for suitable models, review their stated condition and warranty, and contact the team for any missing label or model details needed to complete your comparison.

Before you buy

  • Record exact model numbers and readable efficiency label details.
  • Find the electricity usage tariff on your own bill.
  • Use consistent assumptions for annual appliance use and water.
  • Compare running estimates alongside fit, condition and purchase costs.

Sources & further reading

Prepared with AI assistance using the manufacturer and Australian guidance linked below. Check the exact model’s documentation when planning a purchase or installation.