It used to be claimed that chest freezers were more efficient than upright freezers, but our latest test doesn’t back this up. Other factors in newer freezer designs, such as insulation thickness and size and type of compressor, can have a much bigger impact on efficiency than whether the freezer is a chest or upright type, or even if it is frost-free or not.
While in general a bigger fridge will use more power than a smaller one, some smaller models we've tested cost half as much again to run as some bigger models. A fridge's "star rating" and annual energy consumption is printed on the label so you can make comparisons in the showroom. All fridges must have the label, but watch for tricks like putting the display card over the top of the label.
When you’re comparing freezers and fridge-freezers, it's worth comparing the energy use figures on the labels, the annual running costs from our test or checking the Australian Greenhouse Office website which has a 10-year running cost calculator.