Winter has well and truly arrived in Melbourne—and if that icy snap wasn’t a wake-up call, we don’t know what is! It’s officially time to switch your reverse cycle air conditioner from cool to heat mode.

But now comes the million-dollar question:
What’s the perfect winter temperature setting for your air conditioner that keeps everyone comfortable without spiking your power bill?

Let’s break it down.

The Ideal AC Temperature in Winter

Experts agree that the most efficient and comfortable temperature for heating during the day is around 24°C. At night, you can lower it slightly—around 18–20°C for adults, and 20–22°C for babies and toddlers—since bedding helps trap body heat.

Of course, personal comfort can vary. Some people run hot, while others feel the chill more intensely. The key is to strike a balance that suits your household—keeping warmth and efficiency in mind.

Why Getting the Right Temperature Matters

Choosing the right temperature setting is more than just about how cozy you feel—it impacts your health, your wallet, and even the environment.

🦠 Health and Wellness

Colder indoor air can weaken your body’s natural defences, especially your mucous membranes, making you more prone to colds, flu, and other viruses.

😮‍💨 Asthma & Humidity

When it’s too cold indoors, moisture doesn’t evaporate as easily—leading to increased humidity. This can be a nightmare for asthma sufferers, as it may trigger breathing issues and worsen allergies due to the presence of dust, mould, and pollen.

🥵 Overheating Risks

Turning up the heat too high—especially at night—can cause overheating. That can lead to dehydration, poor sleep, or even heat-related health issues, particularly in older adults.

💰 Rising Energy Bills

It’s simple math: for every degree higher you set your heater above 24°C, your system uses approximately 5% more energy. Some estimates say it can be as much as 10% per degree! That adds up quickly on your electricity bill.

🌱 Environmental Impact

The more energy your air con uses, the larger your carbon footprint. Choosing the right settings helps reduce greenhouse gas emissions while keeping your home cozy.

Is Your Air Conditioner Working Harder Than It Should?

If you’ve set your air con to the recommended temperature but your space still feels too cold or hot, the issue might be system size.

A unit that’s too small will struggle to heat your home, while one that’s too large may waste energy by cycling on and off frequently. Either way, your comfort (and your bills) suffer.

👉 Need help choosing the right system for your home? We’ve got you covered.

5 Smart Tips to Boost Heating Efficiency

Make your home warmer, healthier, and more cost-effective with these easy steps:

1. Clean Your Air Filters

Clogged filters reduce airflow and make your unit work harder. Clean them every 2–3 months to keep things efficient.

2. Insulate Your Ceiling

Up to 35% of indoor heat escapes through the ceiling. Roof insulation helps trap warmth in winter and keeps heat out in summer.

3. Seal Draughts

Older Melbourne homes often let in cold air through gaps and cracks. Draught-proofing windows, doors, and even under floors can make a noticeable difference.

4. Use Curtains Wisely

Let sunlight warm your home during the day by keeping curtains open. Close them at night to trap heat and prevent warmth from escaping through windows.

5. Book a Professional Service

An annual AC service ensures your system runs efficiently and safely. We’ll check the refrigerant, clean internal components, and catch any issues early—so you’re not left out in the cold.

Need a New System or a Service? Call the Experts.

At Melbourne Aircon Specialists, we help homeowners across Melbourne stay warm, save energy, and choose the best systems for their needs. Whether you need a new unit, expert advice, or a seasonal service—we’re here to help.

📞 1300 001 690
📧 info@melbourneairconspecialist.com.au
🌐 melbourneairconspecialist.com.au

Stay warm, stay efficient—and stay one step ahead of Melbourne’s winter.

What Temperature Should You Set Your Air Conditioner to in Winter?