Look for appliances with a high Australian Energy Rating star rating, and compare their estimated annual energy use on the label. Fridges, washing machines, dishwashers, air conditioners and heat-pump hot-water systems can make a noticeable difference because they are used regularly. Choose a suitable size, use eco settings where practical, and maintain appliances so they do not work harder than necessary. You can compare models using the official Energy Rating website, while your actual savings will depend on usage, tariffs and household circumstances.