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How Energy Ratings Work for Air Conditioners

How Energy Ratings Work for Air Conditioners
November 23, 2015 Star Air Conditioning


Have you ever come across an energy rating label for an Air Conditioner or an appliance? What exactly does it mean, and how does it apply to an air conditioning system?

Space conditioning, or heating and cooling, accounts to 40% of average Australian household energy consumption, with Appliances following after at 25%. So, it makes sense to find the most energy efficient product you can find for your household.


All domestic single phase, non-ducted air conditioners must carry an Energy Rating Label. Labels for Ducted Air Conditioners are voluntary within Australia and New Zealand, so not all ducted products will have one. As you may have seen with other products and appliances, air conditioners are given a star rating, blue for their cooling function and red for their heating function. An increase in 1 star is the estimated equivalent of 10% – 30% in savings. The more stars, the more efficient the product is. The average rating for efficiency is up to 6 stars. But if a product has a ‘super efficiency rating’ band this will show a total of 10 stars.

Air Conditioner Labels - Stars_0

You can compare products on stars, but it is important to look for a product that is the same or similar in size to get an accurate calculation. To calculate the energy rating you simply multiply the kilowatt-hour (kWh) by the electricity tariff for your state. If you aren’t great at math you can check out the online calculator here or download the app for your smart device.


Air Conditioners are like Icebergs. The part of the iceberg that you can see is the tangible air conditioning unit. However, the part you can’t see is the hidden cost of running an air conditioner. Remember, the higher the efficiency, the more you save!

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