Summer is approaching. When it comes to ensuring a comfortable environment in the scorching Australian summers, a reliable air conditioning system is indispensable. As you navigate through this article, you’ll uncover key insights and expert advice on maximising your cooling efficiency.  

Behind much of this expertise stands Independent Air Conditioning Solutions (IACS). With over 20 years of experience, IACS, an entirely Australian-owned and operated enterprise, has been providing bespoke air conditioning solutions tailored to our unique climate.  

What is ‘summer mode’? 

‘Summer mode’ in the context of heating, ventilation, and air conditioning (HVAC) systems refers to a set of adjustments tailored for the warmer months. This isn’t just about comfort; it’s also about efficiency. While the specifics of what constitutes ‘summer mode’ can vary based on the type of system and the user’s preferences, the concept generally encompasses the following aspects: Here’s a more detailed breakdown: 

Cooling mode activation: Most modern HVAC systems can both heat and cool. Switching to summer mode typically means activating the cooling function of the system. This will ensure that the system is blowing cold air into the living space and removing warm air. 

Thermostat adjustments: The thermostat settings are changed to maintain a cooler indoor climate. For instance, during winter, you might set the thermostat to 21°C (70°F) for warmth. In summer mode, you might set it to 24°C (75°F) or higher to conserve energy while still maintaining comfort. 

Fan settings: In many HVAC systems, there’s an option to control the fan’s operation. During summer, it might be advantageous to set the fan to “On” rather than “Auto”. This continuous circulation can provide a more consistent temperature throughout the home and assist with air filtration. 

Dehumidification: In humid areas, summer mode might involve activating or optimising a system’s dehumidification capabilities. Excess humidity can make indoor environments feel warmer and stickier, even with air conditioning. By reducing indoor humidity, the living space feels more comfortable, often allowing for higher thermostat settings and energy savings. 

Zoning and distribution: Some advanced HVAC systems allow homeowners to control which areas or ‘zones’ of their home get cooled. In summer mode, you might prioritise cooling living areas during the day and bedrooms at night. 

Energy-saving features: Many modern systems come with features designed to reduce energy consumption, such as eco-modes or smart thermostats that learn your habits. Engaging these features can be part of transitioning to summer mode, ensuring that the system cools the home efficiently, based on actual needs. 

Air filtration: Summer can bring a variety of allergens. Ensuring that the HVAC’s filtration system is clean and functioning properly can be part of summer preparations, providing cleaner indoor air. 

Understanding Australian climate 

In the summer, Australia experiences hot and dry summers, that typically span from December to late February (sometimes extending into March). During this season, powerful cooling systems are essential to combat scorching summer temperatures. In the northern parts of the country, especially areas like Queensland, the summer heat can be relentless, making air conditioning a necessity to maintain a comfortable living environment. However, in the south where the climate is more temperate, air conditioning is still required to combat occasional heatwaves and ensure a pleasant indoor atmosphere during the summer months.  

Steps to switch to summer mode 

As Australia heats up for summer, it’s essential to optimise your HVAC system for efficiency and comfort. Transitioning to summer mode isn’t just about turning up the AC; it involves a series of checks and tweaks. Here’s your quick guide to getting it right. 

Check your system 

Inspection: Before diving into settings, give your HVAC a thorough look-over. This means checking both the indoor and outdoor units. 

Filters: Dust and debris tend to accumulate on filters over time, reducing efficiency. Cleaning or replacing them ensures that the air flowing through your home is clean and the system doesn’t have to work overtime. 

Sounds: Any unfamiliar sounds can be a signal of issues. Humming is normal; rattling or grinding is not.  

Professional assessment: If you’re uncertain about anything, or it’s been a while since a professional took a look, schedule a maintenance visit. 

Set the thermostat 

Temperature setting: A range between 24°C to 26°C strikes a good balance between comfort and economy.  

Energy consumption: Australian summers can be quite intense. However, being cautious about setting the temperature too low saves on energy. As a guideline, for every degree below 24°C, energy consumption might increase by about 10%.  

Use ceiling fans 

Air circulation: Fans aid in distributing the cool air more uniformly across rooms, enhancing the comfort level. 

Directional flow: Setting your fans to rotate counterclockwise during summer ensures that the cooler air is pushed downwards, maximising the cooling effect.

Check the system’s zoning 

Zone-based cooling: Modern HVAC systems allow for zone-based cooling. This lets you focus on cooling specific areas, avoiding wasted energy in unused rooms. 

Programmable thermostats: If your system has one, set schedules that match your daily routines. This way, you’re not cooling an empty home. 

Ensure good insulation 

Barrier to heat: A well-insulated home acts as a barrier, preventing the cool air inside from escaping and the external heat from intruding. 

Key areas: Focus on attics, walls, and basements. These are often the primary sources of heat exchange. 

Seal gaps and cracks 

Visual inspection: Periodically walk around your home, checking for visible gaps, especially around windows and doors. 

Weatherstripping and caulking: These are effective solutions to seal minor gaps and ensure your cooling isn’t wasted. 

Utilise natural ventilation 

Timing is key: The early mornings and late evenings can be pleasantly cool. Harness this by opening windows during these times. 

Cross-ventilation: If possible, open windows on opposite sides of your home to encourage a cooling flow of air. 

Use curtains and blinds 

UV protection: Some curtains and blinds offer UV protection, reducing the greenhouse effect in your home. 

Reflective backings: Consider curtains with a reflective backing. They can further reduce the heat entering your home, especially from direct sunlight. 

What is the benefit of switching to summer mode? 

Switching to summer mode in an HVAC system offers several benefits, particularly when transitioning from the colder months to the warmer ones. Here are the advantages of making this transition: 

Optimal comfort: The primary purpose of an HVAC system is to maintain a comfortable indoor environment. Switching to summer mode ensures that your living or working space remains at a comfortable temperature, even as outdoor temperatures rise. 

Energy efficiency: Properly transitioning your system for the season helps it operate more efficiently. For instance, setting the thermostat at an optimal summer temperature or ensuring that the system is cooling and not inadvertently heating can save energy. 

Cost savings: An energy-efficient system translates to reduced energy consumption. This can lead to significant savings on utility bills over the course of the summer months. 

Extended equipment lifespan: Running an HVAC system under the right settings and ensuring regular maintenance can reduce unnecessary wear and tear. This can extend the system’s overall lifespan and reduce the frequency and cost of repairs. 

Better air quality: Cleaning or replacing filters and ensuring the system is functioning optimally can improve indoor air quality. During summer, there’s often more pollen and other potential allergens in the air, so a well-maintained system can help filter these out. 

Humidity control: Many modern HVAC systems also control indoor humidity. In regions with humid summers, this feature is crucial. Excess humidity can make indoor conditions feel hotter and less comfortable. It can also encourage the growth of mould and mildew. 

Environmental benefits: An efficiently running HVAC system consumes less energy, leading to a reduction in greenhouse gas emissions associated with energy production. This means a smaller carbon footprint for the household or building. 

Peace of mind: Knowing that your system is set up correctly for the season can offer peace of mind. It means there’s a lower chance of unexpected breakdowns or performance issues during the hottest days when you rely on your system the most. 

Not all HVAC systems are modern or advanced enough to efficiently switch to ‘summer mode’. That’s why it’s important to invest in systems that are designed with the latest technology and a keen understanding of varying climatic demands. Independent Air Conditioning Solutions (IACS) offers a range of air conditioning and air handling products tailored to meet these evolving requirements.  

With over 20 years in the industry, IACS products embody excellence, ensuring optimal performance year-round, regardless of the season. If you’re considering an upgrade or a new installation, it might be time to explore the cutting-edge solutions that IACS brings to the table. Our products don’t just promise efficiency; they deliver it. 


Throughout this article, the significance of a top-notch and reliable air conditioning system for Australia’s unique climate is evident. When it comes to sourcing the finest air conditioning and air handling systems, Independent Air Conditioning Solutions (IACS) stands unmatched with over two decades of dedication and expertise.  

If you’re deliberating about choosing a new system or gaining a deeper understanding of air conditioning solutions, IACS offers unparalleled expertise. Rooted in genuine Australian values and industry knowledge, we are the trusted choice for discerning customers. Why compromise? Opt for IACS and align with quality. Reach out to IACS today for the best in air conditioning solutions.