Cool your home efficiently

Last updated: 20 December 2022

Active cooling systems such as fans, evaporative coolers and air conditioners play their part when cooling a house, but passive techniques that focus on windows, draught proofing, ventilation, insulation and landscaping can reduce energy consumption and be instrumental in keeping a house cool during the heat of the summer months.

Optimising your home for passive cooling will greatly reduce your reliance on active systems, helping to reduce costs and ensure your home is more resilient to extreme temperatures.

Keep the summer heat out

man closing blind over window with sun coming through

The ability to cool down your home in summer and reduce your energy consumption and costs is affected by 5 key factors.

Operate your cooling system efficiently

Use of insulation, shading, draught proofing and ventilation, all passive cooling techniques, can keep your home comfortable on all but the hottest days, minimising the amount of active cooling you need to use and reducing your summer energy costs. Fans provide a low-cost form of cooling that can also reduce the need to turn on air conditioners and evaporative coolers.

If you have an air conditioner or evaporative cooler, choosing an efficient model and using it efficiently will help to reduce your summer cooling costs even further.


Ceiling, wall-mounted and portable electric fans can be a cheap and effective way to stay comfortable on warm, humid summer nights. Fans are inexpensive to purchase and can cost less than two cents per hour to run.

Although fans do not reduce the air temperature, when used in conjunction with your air conditioner or evaporative cooler they can reduce the need to use your cooling system. Fans help to keep you feeling more comfortable without having to operate your air conditioner at lower temperature settings.

Fans can also assist with natural ventilation, helping to move air through your home.

Air conditioners

Air conditioners extract heat from the air inside your house and transfer it outside, cooling the air to a temperature determined by a thermostat. They are available in portable, room and ducted systems. Reverse cycle air conditioners can also be used to efficiently heat your home in winter, meaning they can keep your home comfortable year-round.

woman on ladder adjusting wall mounted air conditioner

Efficient use of air conditioners

The following tips will help to ensure you are getting the most out of your air conditioning system.

Evaporative cooling

Evaporative cooling systems draw air through a moist filter pad, cooling and humidifying the air before it is blown through your house. They are available in ducted, wall-mounted and portable units, and work best in dry conditions. Evaporative coolers are less effective in extreme heat and on humid days and are not well suited to humid climates.

Efficient use of evaporative cooling

The following tips will help to ensure you are getting the most out of your evaporative cooling system.