
In Australian homes, aircon temperature plays a significant role in maintaining a comfortable living space.
A temperature difference of 1-2°C between the indoor and outdoor aircon temperatures can make a noticeable difference in energy consumption.
Setting your aircon to a moderate temperature, around 23-25°C, can help you save up to 10% on your energy bills.
For every degree of temperature change, your aircon's energy consumption increases by about 6%.
Setting the Right Temperature
The ideal air conditioner temperature is a bit of a mystery, but the US Department of Energy suggests it's 78°F for summer days.
In Australia, the ideal temperature is a bit lower, ranging from 24-26°C, according to the Department of Industry, Science, Energy, and Resources. The Australian Building Codes Board recommends a maximum of 26°C for commercial spaces.
The average air conditioning temperature is between 72° to 78°F, but this can vary depending on your location and comfort level. A study in Texas found that the model temperature during summer months was between 70° and 75°F.
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You might be wondering, what's the big deal about temperature? Well, it can affect energy efficiency, wear and tear on your air conditioner, and system performance. For example, setting the temperature too low in cooling mode can lead to increased wear and tear on the system.
Here's a rough guide to the ideal temperatures for different situations:
Remember, the ideal temperature is a personal thing, but setting it too high or too low can have consequences for your energy bills and air conditioner's lifespan.
To Maximise Savings on Your Energy Bill
To maximise savings on your energy bill, you need to understand the ideal temperature range for comfort. The US Department of Energy suggests that the best AC temperature is 78°F for summer days.
The lower you set your AC temperature, the harder it will have to work, resulting in higher cooling costs. Every time an AC owner reduces their temperature by one degree in summer, their energy consumption goes up by 10 percent.
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A study estimates that keeping your home at 85°F for eight hours a day during peak cooling times can save you 5% to 15% on your cooling bills. This is especially true if you're not home during the day, as you can set the temperature 7° to 10° higher.
You can also save money by using shades, curtains, and blinds for windows. Blackout blinds can help keep the sunshine from warming up rooms in your home, allowing you to turn the temperature up on your AC.
Here are some temperature settings to keep in mind:
- Ideal temperature for summer: 78°F
- Temperature to save money when you're not home: 85°F
- Temperature to maintain comfort and energy efficiency in Australian summers: 24 – 25 degrees
By understanding these temperature settings, you can make informed decisions about how to save money on your energy bill.
Comfort and Sleep
Setting the right temperature for sleep is crucial for a good night's rest. Your body needs to drop its temperature by around 2-3 degrees in order to fall asleep.
The ideal temperature range for sleeping is between 60° and 67°F, which can be achieved by setting your thermostat 4° higher than your daytime setting. However, if you prefer a cooler room, you can turn the thermostat down instead.
Running fans in bedrooms can help circulate air and keep the rest of the house at a consistent temperature. You can also open the windows while you sleep and close them in the morning to trap cool air inside.
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Best AC for Sleep
Setting the perfect temperature for sleep can be a bit tricky, especially during the summer. The best temperature for sleeping in summer is said to be between 60° and 67°F.
If you can sleep soundly in a warm room, Energy Star recommends setting the temperature 4° higher than your daytime setting.
Opening windows while you sleep can be a great solution if you live in an area that cools down overnight. This allows you to let in the cooler air and then close the windows in the morning to trap the cool air inside.
Comfortable Sleeping
Setting your thermostat at night can be a bit tricky, but Energy Star recommends setting it 4° higher than your daytime setting if you can sleep soundly in a warm room. This can help save energy.
The best temperature for sleeping in summer is between 60° and 67°F, which is cooler than the daytime setting. Some people prefer a cooler room, while others can sleep soundly in a warm room.
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Opening the windows while you sleep can be a good solution if you live in an area that cools down overnight. This allows you to trap cool air inside and gives your air conditioner a head start in the morning.
You can also run fans in bedrooms to circulate air and keep the rest of the house at a consistent temperature. This can help you sleep better and save energy.
Your body needs to drop its temperature by around 2-3 degrees to fall asleep, and reducing your air conditioner temperature can significantly improve your sleep quality. Setting your air conditioner to 18-21°C while you sleep is a good starting point.
If you feel too warm at 18-21°C, you can increase the temperature in the summer months to save energy. The US Department of Energy and Energy Star suggest that 78°F is a good temperature for summer days.
However, some people prefer a cooler temperature, so it's up to you to decide what works best for you.
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21-22: Optimal Winter Health

Setting your air conditioner to 21-22 degrees is the key to a comfortable and healthy indoor climate during Australian winters. This temperature range allows your air conditioner to work efficiently without straining to maintain a warm indoor climate.
In fact, the World Health Organization recommends keeping your home above 21°C to improve health in adults with Chronic Obstructive Pulmonary Disease (COPD). This is because warmer indoor temperatures can help alleviate symptoms of COPD.
Children with asthma also benefit from maintaining a comfortable indoor temperature. Low room temperatures, below 9°C, can worsen lung function in kids with asthma. By keeping your home at a comfortable temperature, you can help your little ones breathe easier.
If you have a family member with COPD, it's worth noting that maintaining an indoor temperature above 18.2°C can help reduce respiratory issues, regardless of humidity. This is a simple yet effective way to create a healthier indoor environment.
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Here are some key temperature guidelines to keep in mind:
Optimal Temperature for Australian Climate
In the Australian climate, it's essential to find a comfortable temperature that balances energy efficiency and personal comfort. Setting the temperature 7° to 10° higher when you're gone during the day can save you 5% to 15% on your cooling bills.
A programmable thermostat is a great investment, allowing you to set your home to cool to 78°F right before you return from work. This temperature, combined with dressing for the season and running a ceiling fan, can make you feel as comfortable as a 74°F room with no airflow.
If you live in an area that cools down overnight, consider opening your windows while you sleep to let in the cool air, then closing them in the morning to trap the cool air inside. This can give your air conditioner a head start and save you energy.
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Best Conditioner for Australian Summers
Setting the right temperature for your air conditioner is crucial in Australian summers. Set your air conditioner to 24 – 25 degrees to ensure optimal comfort and maximum energy efficiency from your unit.
Over-cooling your home can lead to excessive energy bills. Many households tend to over-cool their homes in summer, so it's essential to strike a balance.
Leaving your air conditioner on and letting it maintain a comfortable temperature is the way to go. This allows your fans to circulate the air without removing all the moisture, which can be harmful to your indoor plants and flowers.
Summer Conditioner Usage
Setting your air conditioner to 24 – 25 degrees in Summer is ideal for optimal comfort and maximum energy efficiency.
Turning your air conditioner off constantly when it gets too cold is a sign of inefficient cooling. Ideally, you should be able to leave your system on and let it maintain a comfortable temperature while you are home. This has the added benefit of ensuring that your fans don’t remove all the moisture from the air, which can be harmful to your indoor plants and flowers.
The US Department of Energy suggests that the best AC temperature is 78°F for summer days.
Keeping your home at 85°F for eight hours a day during peak cooling times can save you 5% to 10% on your cooling bills.
Running the ceiling fan to create a wind chill effect can make you feel up to 4° cooler, meaning a 78°F room with a fan running feels as comfortable as a 74°F room with no airflow.
Blackout blinds and keeping the sunshine from warming up rooms in your home can help you turn the temperature up on your AC and save money.
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Reducing Heat Gain and Energy Consumption
A 1°C change in your air conditioner's temperature can alter your energy consumption by up to 10%. This small change can have a significant impact on your energy bills.
To minimize heat gain, aim for the smallest gap between your indoor temperatures and the outdoor temperatures. This means finding a comfortable thermostat setting that's not too far from the outside temperature.
A recommended temperature for comfort on most summer days is 78°F. At this temperature, you can wear light clothing and run fans to stay comfortable during the day.
Raising the temperature by 8°F at night can save you from 5% to 25% on your energy bills. This is a wise thermostat control that can make a big difference in your energy consumption.
Here are some temperature guidelines to keep in mind:
Lowering your indoor temperature too far can result in higher cooling costs. Every time you reduce your temperature by one degree in summer, your energy consumption goes up by 10 percent.
General Information
Aircon temperature can have a significant impact on your comfort and energy consumption.
The ideal temperature for aircon is between 24°C and 27°C, as this range is most comfortable for the human body.
Setting your aircon to 25°C can save you up to 30% of your energy consumption compared to setting it at 20°C.
A 1°C drop in temperature can increase your energy consumption by 6%.
Lowering the temperature by 1°C can also increase your energy bill by around 12%.
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